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# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 33

Publication Year: 2012, Page(s):C1 - C4
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• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2012, Page(s): C2
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• ### Gyrotropy and Nonreciprocity of Graphene for Microwave Applications

Publication Year: 2012, Page(s):901 - 914
Cited by:  Papers (84)
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This paper investigates the potential of graphene nonreciprocal gyrotropy for microwave applications. First, the problem of a plane wave obliquely impinging on a graphene sheet is analyzed to provide physical insight into the fundamentals of graphene gyrotropy. It is found that graphene rotates the polarization of any plane wave impinging on it. The rotation angle is larger for H-polarized ... View full abstract»

• ### Nonperiodic Perturbations in Periodic RF Structures

Publication Year: 2012, Page(s):915 - 929
Cited by:  Papers (3)
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This paper presents analysis of the effects of nonperiodic perturbations in periodic RF structures. Small departures from periodicity change the phase shift experienced by a wave as it traverses an imperfect cell. Cell imperfections may be introduced intentionally or due to fabrication errors or material properties variations. The cumulative effect produces distortions of the fields. If the errors... View full abstract»

• ### Parallel Frequency-Domain Simulation of Hyperspectral Waveforms in Nonlinear Power Amplifiers With Memory

Publication Year: 2012, Page(s):930 - 937
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We present a parallelization framework prototype for efficient physics-based computer simulation of hyperspectral time-dependent waveforms (i.e., wideband with a large number of frequency components) in nonlinear power amplifiers with memory. It relies on an adaptive algorithm for signal splitting and splicing in the time domain and uses a well-established pseudospectral multifrequency large-signa... View full abstract»

• ### A Broadband and Vialess Vertical Microstrip-to-Microstrip Transition

Publication Year: 2012, Page(s):938 - 944
Cited by:  Papers (11)
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A novel, broadband, vialess, and vertical microstrip-to-microstrip transition is proposed in this paper. The transition consists of two open-circuited microstrip resonators and a U-shaped resonant-slot on the common ground plane. A physics-based equivalent-circuit model is developed for interpreting its working mechanism and facilitating the design process. The transition is analogous to a three-p... View full abstract»

• ### A Dual-Band Coupled-Line Coupler With an Arbitrary Coupling Coefficient

Publication Year: 2012, Page(s):945 - 951
Cited by:  Papers (25)
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A novel dual-band coupled-line coupler with an arbitrary coupling coefficient is proposed and investigated in this paper. The coupler has a simple structure and can realize a wide range of the same coupling coefficient over two designated frequencies. The mathematical design formula is also developed, which not only provides a straightforward design procedure, but also reveals the attractive featu... View full abstract»

• ### A Generalized Dual-Band Wilkinson Power Divider With Parallel $L, C,$ and $R$ Components

Publication Year: 2012, Page(s):952 - 964
Cited by:  Papers (26)
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A generalized model of a two-way dual-band Wilkinson power divider (WPD) with a parallel LC circuit at midpoints of two-segment transformers is proposed and compared with that of a conventional two-way dual-band WPD with a parallel LC circuit at the ends of two-segment transformers. The sum of power reflected at an output port and power transmitted to an isolation port from another isolation port ... View full abstract»

• ### Synthesis of Vertical Interdigital Filters Using Multilayered Technologies

Publication Year: 2012, Page(s):965 - 974
Cited by:  Papers (8)
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Taking advantage of multilayer technologies, a vertical evolution of the interdigital topology is proposed with its associated synthesis method. In order to validate this filter topology, a 4-pole filter, centered at 10 GHz, and an 11-pole filter, centered at 6 GHz, have been designed and fabricated using low-temperature co-fired ceramic (LTCC) technology. Two other multipole filters have also bee... View full abstract»

• ### Microstrip Bandpass Filters With Various Resonators Using Connected- and Edge-Coupling Mechanisms and Their Applications to Dual-Band Filters and Diplexers

Publication Year: 2012, Page(s):975 - 988
Cited by:  Papers (7)
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Microstrip bandpass filters designed with various types of transmission-line resonators are newly proposed in this study. The connected-coupling mechanisms are theoretically analyzed and then appropriately applied in the design of an all-connected-coupling basic filter for preliminary validation. With the simultaneous utilization of conventional edge-coupling and the proposed connected-coupling me... View full abstract»

• ### Design and Analysis of a Tri-Band Dual-Mode Chip Filter for 60-, 77-, and 100-GHz Applications

Publication Year: 2012, Page(s):989 - 997
Cited by:  Papers (4)
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A tri-band dual-mode chip filter, which is fabricated with a commercial monolithic microwave integrated circuit technology and suitable for millimeter-wave applications, is presented in this paper. This filter is constructed by using stacked ring resonators with individual perturbation and feeding capacitors, thus fractional bandwidths and center frequencies of three passbands can be flexibly cont... View full abstract»

• ### WR1.5 Silicon Micromachined Waveguide Components and Active Circuit Integration Methodology

Publication Year: 2012, Page(s):998 - 1005
Cited by:  Papers (28)  |  Patents (2)
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This paper describes the development of silicon micromachined waveguide structures operating in the WR1.5 waveguide band (500-750 GHz). Average waveguide loss of 0.15 dB/mm was measured at 600 GHz. Capabilities of the proposed approach have been shown with the development of a 570-GHz three-pole waveguide bandpass filter that has a 0.9-dB passband loss and a Y-junction coupler operating at 670 GHz... View full abstract»

• ### A Systematic Design Procedure of Classical Dual-Mode Circular Waveguide Filters Using an Equivalent Distributed Model

Publication Year: 2012, Page(s):1006 - 1017
Cited by:  Papers (12)
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In this paper, we propose a systematic procedure for the accurate design of classical dual-mode filters in circular waveguide technology. The design procedure is based on the previous synthesis of an intermediate distributed model, which links the standard lumped (or coupling matrix) elements circuit with the practical waveguide realization. We then show how the equivalent distributed model can be... View full abstract»

• ### Theoretical Design and Analysis for ${rm TE}_{20}$– ${rm TE}_{10}$ Rectangular Waveguide Mode Converters

Publication Year: 2012, Page(s):1018 - 1026
Cited by:  Papers (4)
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From Maxwell's equations in an orthogonal curvilinear coordinates system, a strict derivation of mode coupling coefficients among TEn0 rectangular waveguide modes is given, obtaining the general and explicit formulas of the coupling coefficients. Theoretical design methods and a useful set of expressions for several kinds of overmoded rectangular waveguides are reported, which enable en... View full abstract»

• ### Ring-Resonator-Inspired Power Recycling Scheme for Gain-Enhanced Distributed Amplifier-Based CRLH-Transmission Line Leaky Wave Antennas

Publication Year: 2012, Page(s):1027 - 1037
Cited by:  Papers (9)
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We propose a novel power recycling scheme for distributed amplifiers (DAs) integrated with composite-right/left handed transmission line leaky wave antennas (LWAs). This new type of power recycling scheme is essentially inspired by a ring-resonator. By forming a closed-loop on the drain side LWA of the DA, we create the ring-resonator that is actively coupled by the DA from the gate line and hence... View full abstract»

• ### AlGaN/GaN HEMT With Distributed Gate for Channel Temperature Reduction

Publication Year: 2012, Page(s):1038 - 1043
Cited by:  Papers (2)  |  Patents (1)
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Self heating in electronic devices reduces their performance and lifetime. A novel high electron-mobility transistor (HEMT) layout that reduces the channel temperature is presented. To decrease self heating, the new distributed gate (DG) HEMT is configured with multiple, active, and nonactive sections along each gate-stripe. Simulations and experimental results indicating the improved performance ... View full abstract»

• ### Intrinsically Switched Varactor-Tuned Filters and Filter Banks

Publication Year: 2012, Page(s):1044 - 1056
Cited by:  Papers (35)
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Intrinsically switched tunable filters are switched on and off using the tuning elements that tune their center frequencies and/or bandwidths, without requiring an increase in the tuning range of the tuning elements. Because external RF switches are not needed, substantial improvements in insertion loss, linearity, dc power consumption, control complexity, size, and weight are possible compared to... View full abstract»

• ### Analysis of a New 33–58-GHz Doubly Balanced Drain Mixer in 90-nm CMOS Technology

Publication Year: 2012, Page(s):1057 - 1068
Cited by:  Papers (9)
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A new doubly balanced drain-pumped topology for CMOS passive mixer design is proposed in this paper. In the efforts to improve the conversion loss of passive balanced mixers, the CMOS drain-pumped topology is employed. In addition, the doubly balanced architecture with the advantages of good port-to- port isolations has been combined with the CMOS drain mixer de- sign. For the broad bandwidth and ... View full abstract»

• ### Wideband LNA Using Active Inductor With Multiple Feed-Forward Noise Reduction Paths

Publication Year: 2012, Page(s):1069 - 1078
Cited by:  Papers (20)
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In this paper, an area-efficient LNA with on-chip input matching circuit utilizing an active inductor is presented. The active inductor is implemented based on the gyrator structure and its noise is improved by employing a feed-forward path (FFP). The overall low-noise performance of the LNA is achieved by cancelling the inductor noise through an additional FFP. It is shown that the proposed LNA c... View full abstract»

• ### Design-in-Reliable Millimeter-Wave Power Amplifiers in a 65-nm CMOS Process

Publication Year: 2012, Page(s):1079 - 1085
Cited by:  Papers (9)
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A hot carrier ageing model previously validated on a one-stage 60-GHz power amplifier (PA) is demonstrated to be able to predict the degradation of the characteristic parameters for multistage high-performance millimeter-wave (mmW) PAs. The increase in the threshold voltage, the decrease in the transconductance, and the output conductance of the MOSFETs caused by hot carriers leads to a degradatio... View full abstract»

• ### A Waveform-Dependent Phase-Noise Analysis for Edge-Combining DLL Frequency Multipliers

Publication Year: 2012, Page(s):1086 - 1096
Cited by:  Papers (8)
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Output phase noise for edge-combining delay-locked loops (DLLs) is derived in this study, which is obtained by decomposing the synthesized output waveform into a noise-free signal and a corresponding noise perturbation on it. The noise-free signal, which is affected by the systematic errors as the phase offset between phase detector inputs or delay mismatches among delay cells, possesses a periodi... View full abstract»

• ### 802.11a Compliant Spatial Diversity Receiver IC in ${hbox{0.25-}}mu{hbox {m}}$ BiCMOS

Publication Year: 2012, Page(s):1097 - 1104
Cited by:  Papers (4)
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This paper presents an integrated 802.11a compliant receiver integrated circuit (IC), which is capable of processing four antenna signals using RF multiple-input multiple-output (RF-MIMO) schemes. Following four low-noise amplifiers, the weighting is performed using Cartesian vector modulators, whose output signals are combined and down-converted. The baseband filters, variable gain amplifiers (VG... View full abstract»

• ### 9-GHz Wideband CMOS RX and TX Front-Ends for Universal Radio Applications

Publication Year: 2012, Page(s):1105 - 1116
Cited by:  Papers (5)
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Wideband receiver (RX) and transmitter (TX) RF front-ends for wireless universal radio applications are presented. The RX is comprised of a two-stage low-noise amplifier (LNA) applying feedback and shunt peaking, a combiner buffer for performance boosting, and an inverter-based in-phase/quadrature (IQ) down-conversion mixer. The wideband LNA provides input matching of better than -10 dB from dc to... View full abstract»

• ### A 24-GHz CMOS UWB Radar Transmitter With Compressed Pulses

Publication Year: 2012, Page(s):1117 - 1125
Cited by:  Papers (16)
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A fully integrated 24-GHz CMOS ultra-wideband (UWB) radar transmitter for short-range automotive application is presented. For high-range resolution and improved signal-to-noise ratio, a pulse compression technique using binary phase code is adopted. Design issues of UWB radar transmitter are investigated based on fundamental pulse theory. A pulse former, which operates as a switch to generate a p... View full abstract»

• ### Experimental Characterization of Chiral Uniaxial Bianisotropic Composites at Microwave Frequencies

Publication Year: 2012, Page(s):1126 - 1135
Cited by:  Papers (4)
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This paper presents an experimental procedure for retrieving the effective constitutive parameters of chiral materials. Unlike past research that primarily deals with isotropic materials, this study considers a lossy uniaxial bianisotropic slab with a nonzero chirality along its axial direction. First, plane-wave scattering off the uniaxial slab in a free-space environment is studied analytically.... 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