# IEEE Transactions on Microwave Theory and Techniques

Includes the top 50 most frequently accessed documents for this publication according to the usage statistics for the month of

• ### Digital Beamforming-Based Massive MIMO Transceiver for 5G Millimeter-Wave Communications

Publication Year: 2018, Page(s):1 - 16
| | PDF (6727 KB)

A 64-channel massive multiple-input multiple-output (MIMO) transceiver with a fully digital beamforming (DBF) architecture for fifth-generation millimeter-wave communications is presented in this paper. The DBF-based massive MIMO transceiver is operated at 28-GHz band with a 500-MHz signal bandwidth and the time division duplex mode. The antenna elements are arranged as a 2-D array, which has 16 c... View full abstract»

• ### Highly Efficient 1.8-GHz Amplifier With 120-MHz Class-G Supply Modulation

Publication Year: 2017, Page(s):5223 - 5230
| | PDF (2667 KB) | HTML

A broadband and highly efficient class-G supply modulated power amplifier (PA) system with 120-MHz instantaneous modulation bandwidth operating in the 1.8-GHz band is presented in this paper. The core element is the fast class-G supply modulator which switches the supply voltage of the RF PA between three discrete levels with a minimum pulse duration of 2.5 ns. Two designs for the drain bias inter... View full abstract»

• ### Millimeter-Wave Technology for Automotive Radar Sensors in the 77 GHz Frequency Band

Publication Year: 2012, Page(s):845 - 860
Cited by:  Papers (205)  |  Patents (5)
| | PDF (2507 KB) | HTML

The market for driver assistance systems based on millimeter-wave radar sensor technology is gaining momentum. In the near future, the full range of newly introduced car models will be equipped with radar based systems which leads to high volume production with low cost potential. This paper provides background and an overview of the state of the art of millimeter-wave technology for automotive ra... View full abstract»

• ### $V$ - and $W$ -Band Substrate Integrated Waveguide (SIW) Mechanical Switch

Publication Year: 2018, Page(s):3090 - 3098
| | PDF (5132 KB) | HTML

This paper presents high-isolation single-pole-single-throw (SPST) and single-pole-double-throw (SPDT) substrate integrated waveguide (SIW) mechanical switches in $V$ - and $W$ -bands. Four via holes with the proposed ring-and-cross etching patterns on the... View full abstract»

• ### A 40% PAE Frequency-Reconfigurable CMOS Power Amplifier With Tunable Gate–Drain Neutralization for 28-GHz 5G Radios

Publication Year: 2018, Page(s):2231 - 2245
| | PDF (3055 KB) | HTML

In this paper, a high-efficiency frequency-reconfigurable CMOS power amplifier (PA) design technique is presented at 24 and 28 GHz using integrated tunable neutralization and matching networks. To cope with the adverse effects of gate-drain capacitance (Cgd) in millimeter-wave (mm-wave) CMOS PAs in deep-submicrometer technologies, we propose a reconfigurable coupling-coefficient-based t... View full abstract»

• ### Doherty Power Amplifier Distortion Correction Using an RF Linearization Amplifier

Publication Year: 2018, Page(s):2246 - 2257
| | PDF (3374 KB) | HTML

This paper presents a linear Doherty power amplifier (DPA) topology suitable for low-powered small cell and multiantenna fifth generation transceivers. The proposed topology relies on augmenting the conventional two-way DPA with a linearization amplifier (LA) in order to enhance its efficiency versus linearity tradeoff when driven with wideband modulated signals. For this, a study of the interacti... View full abstract»

• ### Dual-Channel Dielectric Resonator Filter and Its Application to Doherty Power Amplifier for 5G Massive MIMO System

Publication Year: 2018, Page(s):1 - 9
| | PDF (2860 KB)

In this paper, a dual-channel dielectric resonator (DR) filter is presented for the first time. Two bandpass filters (BPFs) are integrated as one dual-channel filter with two input ports and two output ports. By using a common quad-mode DR shared by two second-order BPFs, only one metallic cavity is needed, which greatly reduces the circuit size. Frequency control of the DR is investigated and ele... View full abstract»

• ### Magnetism from conductors and enhanced nonlinear phenomena

Publication Year: 1999, Page(s):2075 - 2084
Cited by:  Papers (4575)  |  Patents (230)
| | PDF (236 KB)

We show that microstructures built from nonmagnetic conducting sheets exhibit an effective magnetic permeability μeff, which can be tuned to values not accessible in naturally occurring materials, including large imaginary components of μeff. The microstructure is on a scale much less than the wavelength of radiation, is not resolved by incident microwaves, and uses a v... View full abstract»

• ### Broadband Eight-Port Forward-Wave Directional Couplers and Four-Way Differential Phase Shifter

Publication Year: 2018, Page(s):2161 - 2169
| | PDF (1906 KB) | HTML

We propose a broadband eight-port forward-wave directional coupler (FWDC) with the dually symmetric structure. The novel coupler approximately achieves broadband impedance matching of the four modes. In addition, it can also provide almost constant phase differences among the four modes over a wide frequency range. Therefore, an eight-port FWDC with a broad bandwidth can be expected. Based on the ... View full abstract»

• ### Terahertz technology

Publication Year: 2002, Page(s):910 - 928
Cited by:  Papers (1510)  |  Patents (51)
| | PDF (629 KB) | HTML

Terahertz technology applications, sensors, and sources are briefly reviewed. Emphasis is placed on the less familiar components, instruments, or subsystems. Science drivers, some historical background, and future trends are also discussed View full abstract»

• ### A Novel Dual-Band Decoupling and Matching Technique for Asymmetric Antenna Arrays

Publication Year: 2018, Page(s):2080 - 2089
| | PDF (2744 KB) | HTML

A novel dual-band decoupling and matching technique for asymmetric two-element antenna arrays is proposed. Decoupling and matching at two widely separated frequencies is accomplished by using a two-layer (level) network approach. Unlike previous works, analytical solution is readily available and prematching of the radiating elements is no longer required. Simulation and experimental results show ... View full abstract»

• ### Realistic Air-Filled TEM Printed Parallel-Plate Waveguide Based on Ridge Gap Waveguide

Publication Year: 2018, Page(s):2128 - 2140
| | PDF (5110 KB) | HTML

A double-ridge and double-sided textured surface waveguide based on the printed ridge gap waveguide (PRGW) is introduced. The structure acts as a parallel-plate waveguide supporting TEM waves, and it is referred to as TEM-PRGW. The TEM-PRGW has lower insertion loss and more confined power around the double ridges in comparison with the single-textured PRGW. The characteristic impedance of the TEM-... View full abstract»

• ### Chipless RFID Sensor Tag for Metal Crack Detection and Characterization

Publication Year: 2018, Page(s):2452 - 2462
| | PDF (4434 KB) | HTML

Chipped radio-frequency identification (RFID) sensor systems have been studied for structural health monitoring (SHM) applications. However, the use of chip in sensor tags and its standardized narrowband operation contribute shortcomings in cost, durability, and detection capability. This paper presents a novel use of the frequency signature-based chipless RFID for metal crack detection and charac... View full abstract»

• ### Equivalent-circuit models for split-ring resonators and complementary split-ring resonators coupled to planar transmission lines

Publication Year: 2005, Page(s):1451 - 1461
Cited by:  Papers (628)  |  Patents (7)
| | PDF (1031 KB) | HTML

In this paper, a new approach for the development of planar metamaterial structures is developed. For this purpose, split-ring resonators (SRRs) and complementary split-ring resonators (CSRRs) coupled to planar transmission lines are investigated. The electromagnetic behavior of these elements, as well as their coupling to the host transmission line, are studied, and analytical equivalent-circuit ... View full abstract»

• ### High-impedance electromagnetic surfaces with a forbidden frequency band

Publication Year: 1999, Page(s):2059 - 2074
Cited by:  Papers (2158)  |  Patents (151)
| | PDF (412 KB)

A new type of metallic electromagnetic structure has been developed that is characterized by having high surface impedance. Although it is made of continuous metal, and conducts dc currents, it does not conduct ac currents within a forbidden frequency band. Unlike normal conductors, this new surface does not support propagating surface waves, and its image currents are not phase reversed. The geom... View full abstract»

• ### A Broadband Wilkinson Power Divider Based on the Segmented Structure

Publication Year: 2018, Page(s):1902 - 1911
| | PDF (2441 KB) | HTML

This paper proposes a topology of a broadband Wilkinson power divider based on the segmented structure. The segmented structure is formed by many transmission line segments in shunt with grounded capacitors and series resistor- capacitor networks. Each transmission line segment has the length of a fraction of a quarter of the wavelength (or λ/4) and the summed length of all segments remains... View full abstract»

• ### A Review of GaN on SiC High Electron-Mobility Power Transistors and MMICs

Publication Year: 2012, Page(s):1764 - 1783
Cited by:  Papers (253)  |  Patents (6)
| | PDF (3801 KB) | HTML

Gallium-nitride power transistor (GaN HEMT) and integrated circuit technologies have matured dramatically over the last few years, and many hundreds of thousands of devices have been manufactured and fielded in applications ranging from pulsed radars and counter-IED jammers to CATV modules and fourth-generation infrastructure base-stations. GaN HEMT devices, exhibiting high power densities coupled... View full abstract»

• ### 3-D Millimeter-Wave Statistical Channel Model for 5G Wireless System Design

Publication Year: 2016, Page(s):2207 - 2225
Cited by:  Papers (37)
| | PDF (4462 KB) | HTML

This paper presents a 3-D statistical channel impulse response (IR) model for urban line of sight (LOS) and non-LOS channels developed from 28- and 73-GHz ultrawideband propagation measurements in New York City, useful in the design of 5G wireless systems that will operate in both the ultra-high frequency/microwave and millimeter-wave (mmWave) spectrum to increase channel capacities. A 3GPP-like s... View full abstract»

• ### A Coupled-Line Coupling Structure for the Design of Quasi-Elliptic Bandpass Filters

Publication Year: 2018, Page(s):1921 - 1925
| | PDF (852 KB) | HTML

A coupled-line coupling structure is proposed for the design of quasi-elliptic bandpass filters (BPFs). The coupled-line structure functions as the input coupling structure for a BPF and introduces one pair of symmetrical transmission zeros at around the cutoff frequencies. Equivalent circuit models play an important role in the design of microwave filters. Accordingly, this paper undertakes a maj... View full abstract»

• ### Vertical Integration of High- $Q$ Filter With Circularly Polarized Patch Antenna With Enhanced Impedance-Axial Ratio Bandwidth

Publication Year: 2018, Page(s):3119 - 3128
| | PDF (2198 KB) | HTML

Directly coupling antennas to filters can remove the transition loss between the two and reduce the size of radio frequency front ends. Circularly polarized (CP) patch antennas with a single feed are very popular in many applications due to their compact size and ease of design. However, a probe-fed CP patch antenna typically exhibits only 1%–2% useful fractional bandwidth by ... View full abstract»

• ### Scalable Electromagnetic Energy Harvesting Using Frequency-Selective Surfaces

Publication Year: 2018, Page(s):2433 - 2441
| | PDF (2742 KB) | HTML

We present a frequency-selective surface (FSS) that is specially designed and optimized for ambient RF energy harvesting. The unit cell geometry incorporates channeling features in order to combine the collected power from multiple unit cells, allowing for efficient operation under low-power conditions. To demonstrate its performance, we designed and fabricated a matched full-wave rectifier integr... View full abstract»

• ### A 16-Element W-Band Phased-Array Transceiver Chipset With Flip-Chip PCB Integrated Antennas for Multi-Gigabit Wireless Data Links

Publication Year: 2018, Page(s):1 - 14
| | PDF (6001 KB)

This paper describes the design and implementation of a W-band phased-array system with printed circuit board (PCB) integrated antennas in two polarizations capable of multi-gigabit spectrally efficient wireless communication. The chipset is manufactured in a 0.18-μm SiGe BiCMOS technology with fT/fMAX of 240-/270-GHz and is flip-chipped onto a low-cost organic PCB with integrated antenna a... View full abstract»

• ### Design of Compact High-Isolation Four-Way Power Combiners

Publication Year: 2018, Page(s):2185 - 2198
| | PDF (4199 KB) | HTML

In this paper, the design methods for four-way power combiners based on eight-port and nine-port mode networks are proposed. The eight-port mode network is fundamentally a two-stage binary four-way power combiner composed of three magic-Ts: two compact H-plane magic-Ts and one magic-T with coplanar arms. The two compact H-plane magic-Ts and the magic-T with coplanar arms function as the first and ... View full abstract»

• ### Novel Filtering 180° Hybrid Coupler and Its Application to 2 x 4 Filtering Butler Matrix

Publication Year: 2018, Page(s):1 - 9
| | PDF (2579 KB)

In this paper, a novel filtering 180° hybrid coupler is proposed and used to design a 2 x 4 filtering Butler matrix. The filtering 180° hybrid coupler can provide power division and phase shift together with a second-order bandpass transfer function, and is based only on coupled resonators. The 2 x 4 filtering Butler matrix is easily realized by utilizing several hybrid couplers. The... View full abstract»

• ### Beam-Oriented Digital Predistortion for 5G Massive MIMO Hybrid Beamforming Transmitters

Publication Year: 2018, Page(s):1 - 14
| | PDF (3380 KB)

In this paper, we propose a beam-oriented digital predistortion (BO-DPD) technique for power amplifiers (PAs) in hybrid beamforming massive multiple-input multiple-output (MIMO) transmitters, which can achieve linearization of the transmitted signal in the main beam direction and address the DPD implementation issue in the hybrid beamforming array. In massive MIMO hybrid beamforming transmitters, ... View full abstract»

• ### Guided-wave and leakage characteristics of substrate integrated waveguide

Publication Year: 2005, Page(s):66 - 73
Cited by:  Papers (519)  |  Patents (1)
| | PDF (432 KB) | HTML

The substrate integrated waveguide (SIW) technique makes it possible that a complete circuit including planar circuitry, transitions, and rectangular waveguides are fabricated in planar form using a standard printed circuit board or other planar processing techniques. In this paper, guided wave and modes characteristics of such an SIW periodic structure are studied in detail for the first time. A ... View full abstract»

• ### Slow-Wave Half-Mode Substrate Integrated Waveguide Using Spoof Surface Plasmon Polariton Structure

Publication Year: 2018, Page(s):2946 - 2952
| | PDF (1881 KB) | HTML

In this paper, we propose a novel slow-wave half-mode substrate integrated waveguide (HMSIW) combined with spoof surface plasmon polariton (SPP) structure. In this design, subwavelength corrugated grooves are etched on the up metal layer of HMSIW to support an SPP mode. The dispersion and transmission characteristics of the proposed hybrid HMSIW-SPP structure are analyzed and compared with the cla... View full abstract»

• ### A Novel Arbitrary Terminated Unequal Coupler With Bandwidth-Enhanced Positive and Negative Group Delay Characteristics

Publication Year: 2018, Page(s):2170 - 2184
| | PDF (3820 KB) | HTML

A novel and generalized planar coupler with four independent arbitrary terminated resistances, unequal power division, and wideband positive and negative group delays (NGDs) is proposed. The proposed asymmetrical circuit configuration includes six-section of transmission lines (TLs) and two coupled-line sections with series resistors. Six-section TLs have inherited the free impedance-transformatio... View full abstract»

• ### Adaptive Nonlinear RF Cancellation for Improved Isolation in Simultaneous Transmit–Receive Systems

Publication Year: 2018, Page(s):2299 - 2312
| | PDF (5066 KB) | HTML

This paper proposes an active radio frequency (RF) cancellation solution to suppress the transmitter (TX) passband leakage signal in radio transceivers supporting simultaneous transmission and reception. The proposed technique is based on creating an opposite-phase baseband equivalent replica of the TX leakage signal in the transceiver digital front-end through adaptive nonlinear filtering of the ... View full abstract»

• ### Wideband Bandpass Filter With Extremely Wide Upper Stopband

Publication Year: 2018, Page(s):2822 - 2827
| | PDF (1933 KB) | HTML

The realization of planar wideband bandpass filters with an extremely wide upper stopband is described. The filter design differs from conventional approaches in which it is based on the choice of a wideband bandstop (BS) filter, to which a number of shunt-shorted stubs are connected at specific nodes; the stubs provide transmission zeros at the origin. Two examples of wideband bandpass filters wi... View full abstract»

• ### New Dual-/Tri-Band Bandpass Filters and Diplexer With Large Frequency Ratio

Publication Year: 2018, Page(s):2978 - 2992
| | PDF (4581 KB) | HTML

To satisfy the simultaneous requirements of future wireless communication systems on short-range high-speed data transmission and long-distance basic coverage, the coexistence of the millimeter-wave and microwave technologies becomes the inexorable trend. However, it is difficult for the existing dual-/ tri-band filter configurations to achieve a frequency ratio larger than three. In this paper, t... View full abstract»

• ### A W-Band LNA/Phase Shifter With 5-dB NF and 24-mW Power Consumption in 32-nm CMOS SOI

Publication Year: 2018, Page(s):1973 - 1982
| | PDF (5359 KB) | HTML

This paper presents a W-band phased array receive front end in 32-nm CMOS silicon-on-insulator technology. The architecture is based on cascode low-noise amplifiers and passive switched LC 5-bit phase-shifters and with root-mean-square (rms) phase error of <;3.5° at 88-93 GHz. The 4-bit equivalent (11°) rms phase error bandwidth is 88-98 GHz. An average system noise figure (NF) of... View full abstract»

• ### Design of an 87% Fractional Bandwidth Doherty Power Amplifier Supported by a Simplified Bandwidth Estimation Method

Publication Year: 2018, Page(s):1319 - 1327
| | PDF (2576 KB) | HTML

This paper presents a novel technique for the design of broadband Doherty power amplifiers (DPAs), supported by a simplified approach for the initial bandwidth estimation that requires linear simulations only. The equivalent impedance of the Doherty inverter is determined by the value of the output capacitance of the power device, and the Doherty combiner is designed following this initial choice ... View full abstract»

• ### Design and Analysis of Schiffman Phase Shifter Under Operation of Its Second Phase Period

Publication Year: 2018, Page(s):1 - 7
| | PDF (1858 KB)

In this paper, a new design concept of Schiffman phase shifters under the operation of the second phase period in frequency domain is presented and analyzed. By investigating phase properties of the C-section structure, we first find that its second phase period is another independent and distinctive working region for Schiffman phase shifter, in addition to its first phase period. In contrast to ... View full abstract»

• ### Design Method for Multiband Filters With Compact Configuration in Substrate Integrated Waveguide

Publication Year: 2018, Page(s):3011 - 3018
| | PDF (2309 KB) | HTML

In this paper, a design method for multiband bandpass filters with compact configuration in substrate integrated waveguide is proposed by combining the single-band/dual-band synthesis method and the multimode resonator theory. The designed filters could generate multiple filtering passbands without expanding their entire physical size. In addition, all the passbands could be efficiently synthesize... View full abstract»

• ### A CMOS RF-to-DC Power Converter With 86% Efficiency and −19.2-dBm Sensitivity

Publication Year: 2018, Page(s):2409 - 2415
| | PDF (2375 KB) | HTML

This paper proposes an RF-to-dc power converter for ambient wireless powering that is efficient, highly sensitive, and less dependent on the load resistance with an extended dynamic range. The proposed rectifier utilizes a variable biasing technique to control the conduction of the rectifying transistors selectively, hence minimizing the leakage current; unlike the prior work that has a fixed feed... View full abstract»

• ### Resonant Modes of a Waveguide Iris Discontinuity: Interpretation in Terms of Canonical Circuits

Publication Year: 2018, Page(s):2059 - 2069
| | PDF (2072 KB) | HTML

This paper presents an eigenproblem for computing the resonances of multiresonant irislike discontinuities in waveguides. The formulation of the eigenproblem is based on integral equation methods, and its solution provides the resonance frequencies (eigenvalues) and the associated resonant aperture field's patterns (eigenvectors). These eigenvectors can be used as a basis for the expansion of the ... View full abstract»

• ### Constant In-Band Group-Delay Acoustic-Wave-Lumped-Element-Resonator-Based Bandpass Filters and Diplexers

Publication Year: 2018, Page(s):2199 - 2209
| | PDF (6250 KB) | HTML

The RF design of acoustic-wave (AW)-resonator-based bandpass filters (BPFs) with constant in-band group delay (τg) and analog transfer-function reconfigurability is presented. The proposed filter concept is based on N identical acoustic-wave-lumped-element resonators (AWLRs) that are electromagnetically coupled through impedance inverters and result in quasi-elliptic-type transfer functions... View full abstract»

• ### A Wideband 2$times$ 13-bit All-Digital I/Q RF-DAC

Publication Year: 2014, Page(s):732 - 752
Cited by:  Papers (45)  |  Patents (2)
| | PDF (6002 KB) | HTML

This paper presents a wideband 2 ×13-bit in-phase/quadrature-phase (I/Q) RF digital-to-analog converter-based all-digital modulator realized in 65-nm CMOS. The isolation between I and Q paths is guaranteed employing 25% duty-cycle differential quadrature clocks. With a 1.3-V supply and an on-chip power combiner, the digital I/Q transmitter provides more than 21-dBm RF output power within a ... View full abstract»

• ### SIW Rotman Lens Antenna With Ridged Delay Lines and Reduced Footprint

Publication Year: 2018, Page(s):3136 - 3144
| | PDF (3226 KB) | HTML

A dual-layer Rotman lens with reduced footprint and wide field of view is introduced here in substrate integrated waveguide (SIW) technology in the 24-GHz band. Both layers are connected by a high-efficiency transition made by an SIW integrated reflector and several coupling vias. The delay lines of the Rotman lens are implemented in ridged waveguides for compactness and broadband operation over a... View full abstract»

• ### Highly Miniaturized 120-GHz SIMO and MIMO Radar Sensor With On-Chip Folded Dipole Antennas for Range and Angular Measurements

Publication Year: 2018, Page(s):2592 - 2603
| | PDF (5092 KB) | HTML

This paper describes a highly miniaturized two-channel radar sensor with integrated on-chip folded dipole antennas that exhibit high antenna gain and radiation efficiency due to the use of the selective localized backside etching technique. The sensor can be utilized in single-input multiple-output radar system by combining the two transmit channels to increase the effective isotropic radiated pow... View full abstract»

• ### 15 GHz Doherty Power Amplifier With RF Predistortion Linearizer in CMOS SOI

Publication Year: 2018, Page(s):1339 - 1348
| | PDF (3203 KB) | HTML

A two-stage, high-power symmetric Doherty power amplifier (PA) at 15 GHz is presented. The PA is implemented in 45 nm CMOS silicon on insulator and achieves more than 23 dB power gain with 25.7 dBm saturated output power and 31% peak power added efficiency (PAE). The 6 dB back-off PAE is 25%, which is a 64% improvement compared to ideal class B PA back-off performance. High output power is obtaine... View full abstract»

• ### Ambient RF Energy Harvesting in Urban and Semi-Urban Environments

Publication Year: 2013, Page(s):2715 - 2726
Cited by:  Papers (214)  |  Patents (1)
| | PDF (1376 KB) | HTML

RF harvesting circuits have been demonstrated for more than 50 years, but only a few have been able to harvest energy from freely available ambient (i.e., non-dedicated) RF sources. In this paper, our objectives were to realize harvester operation at typical ambient RF power levels found within urban and semi-urban environments. To explore the potential for ambient RF energy harvesting, a city-wid... View full abstract»

• ### Substrate-Integrated Waveguide Triple-Band Bandpass Filters Using Triple-Mode Cavities

Publication Year: 2018, Page(s):2967 - 2977
| | PDF (2589 KB) | HTML

Substrate-integrated waveguide (SIW) triple-mode triple-band bandpass filters (BPFs) are synthesized, designed, and demonstrated for the first time based on a novel type of SIW triple-mode square cavities perturbed by centered cross-shaped metallized via holes. The resonant characteristics of the cavity are analyzed first to show the range of the realizable frequency ratios, and the design paramet... View full abstract»

• ### Millimeter-Wave Multifunction Multiport Interferometric Receiver for Future Wireless Systems

Publication Year: 2018, Page(s):1452 - 1466
| | PDF (3019 KB) | HTML

In this paper, a receiver architecture is presented which is capable of handling angle-of-arrival (AOA) detection as well as data communication. The architecture of the proposed multifunction receiver is based on the multiport interferometer technique, and it integrates two previously reported six-port-based system functions that were realized as two distinct six-port receivers (SPRs). This unific... View full abstract»

• ### Power amplifiers and transmitters for RF and microwave

Publication Year: 2002, Page(s):814 - 826
Cited by:  Papers (683)  |  Patents (108)
| | PDF (365 KB) | HTML

The generation of RF/microwave power is required not only in wireless communications, but also in applications such as jamming, imaging, RF heating, and miniature dc/dc converters. Each application has its own unique requirements for frequency, bandwidth, load, power, efficiency, linearity, and cost. RF power is generated by a wide variety of techniques, implementations, and active devices. Power ... View full abstract»

• ### A Review on Recent Progress of Portable Short-Range Noncontact Microwave Radar Systems

Publication Year: 2017, Page(s):1692 - 1706
Cited by:  Papers (6)
| | PDF (3657 KB) | HTML

This paper reviews recent progress of portable short-range noncontact microwave radar systems for motion detection, positioning, and imaging applications. With the continuous advancements of modern semiconductor technologies and embedded computing, many functionalities that could only be achieved by bulky radar systems in the past are now integrated into portable devices with integrated circuit ch... View full abstract»

• ### Coupling Substrate-Integrated Waveguides to Increase the Gain Bandwidth of Leaky-Wave Antennas

Publication Year: 2018, Page(s):3099 - 3109
| | PDF (3688 KB) | HTML

A novel technique to increase the pattern bandwidth of substrate-integrated waveguide leaky-wave antennas (SIW LWAs) is proposed. By coupling several SIWs, it is shown that the gain at the desired angle can be kept stable across a wide-frequency band. A systematic design methodology based on a simple transverse equivalent network is presented. Practical coupled-SIW designs with gain exceeding 10 d... View full abstract»

• ### A 6–18-GHz GaAs Multifunction Chip With 8-bit True Time Delay and 7-bit Amplitude Control

Publication Year: 2018, Page(s):2220 - 2230
| | PDF (4533 KB) | HTML

This paper presents a monolithic microwave integrated circuit multifunction chip implemented using a 0.25-μm gallium arsenide pseudomorphic high-electron-mobility transistor process for use in a phased array jammer transmitter. This chip, which operates in the frequency range of 6-18 GHz, provides several functions including 8-bit true time delay (TTD), 7-bit attenuation, wideband amplifica... View full abstract»

• ### Analytical Solutions and Characteristics for Shielded Asymmetrical Coplanar Stripline and Its Transition to Rectangular Waveguide

Publication Year: 2018, Page(s):2090 - 2099
| | PDF (1628 KB) | HTML

Analytical solutions and characteristic analysis for the shielded asymmetrical coplanar stripline (SACPS) are presented. The SACPS consists of a metal shielding cavity and an asymmetrical coplanar stripline with finite-boundary substrate. Analytical closed-form expressions for the quasi-TEM electrical parameters including the relative effective permittivity, phase velocity, and characteristic impe... View full abstract»

## Aims & Scope

The IEEE Transactions on Microwave Theory and Techniques focuses on that part of engineering and theory associated with microwave/millimeter-wave components, devices, circuits, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals. This includes scientific, technical, and industrial, activities. Microwave theory and techniques relates to electromagnetic waves usually in the frequency region between a few MHz and a THz; other spectral regions and wave types are included within the scope of the Society whenever basic microwave theory and techniques can yield useful results. Generally, this occurs in the theory of wave propagation in structures with dimensions comparable to a wavelength, and in the related techniques for analysis and design..

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## Meet Our Editors

Editor-in-Chief
Luca Perregrini
luca.perregrini@unipv.it

Editor-in-Chief
Jose Carlos Pedro
edit.tmtt@ua.pt