# IEEE Transactions on Microwave Theory and Techniques

## Issue 12  Part 2 • Dec. 2012

This issue contains several parts.Go to:  Part 1

## Filter Results

Displaying Results 1 - 25 of 42
• ### Front cover

Publication Year: 2012, Page(s): C1
| |PDF (1988 KB)
• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2012, Page(s): C2
| |PDF (143 KB)

Publication Year: 2012, Page(s):3889 - 3891
| |PDF (192 KB)
• ### Editorial

Publication Year: 2012, Page(s): 3892
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• ### Evanescent-to-propagating wave conversion in sub-wavelength metal-strip gratings

Publication Year: 2012, Page(s):3893 - 3907
Cited by:  Papers (11)
| |PDF (2692 KB) | HTML

Transmitting sub-wavelength information to the far-zone is of great interest for various electromagnetics and optics applications, e.g., for overcoming the diffraction limit in imaging or enabling multiple-input/multiple-output operation in closely spaced antennas. The common phenomenon in these applications is the conversion of evanescent to propagating waves. In this paper, we rigorously analyze... View full abstract»

• ### Analytical Wideband Model for Strip/Slit Gratings Loaded With Dielectric Slabs

Publication Year: 2012, Page(s):3908 - 3918
Cited by:  Papers (25)
| |PDF (2491 KB) | HTML

This paper presents a fully analytical model to determine the transmission and reflection properties of planar 1-D distributions of metal strips or slits made in thin metal screens. In contrast with other analytical or quasi-analytical approaches, the formulation incorporates the presence of dielectric slabs and is valid over a wide frequency band, from the long wavelength limit to the grating lob... View full abstract»

• ### Expedient Electromagnetic Analysis of the Impact of Statistical Disorder in Periodic Waveguides

Publication Year: 2012, Page(s):3919 - 3926
Cited by:  Papers (6)
| |PDF (994 KB) | HTML

A methodology is presented for the fast electromagnetic analysis of the impact of statistical disorder on the transmission properties of periodic waveguides. The proposed methodology makes use of ideas from the Anderson localization theory to derive closed-form expressions for the calculation of an effective exponential decay ratio that quantifies the impact of periodicity disorder on the transmis... View full abstract»

• ### Macromodeling of Distributed Networks From Frequency-Domain Data Using the Loewner Matrix Approach

Publication Year: 2012, Page(s):3927 - 3938
Cited by:  Papers (18)
| |PDF (2584 KB) | HTML

Recently, Loewner matrix (LM)-based methods were introduced for generating time-domain macromodels based on frequency-domain measured parameters. These methods were shown to be very efficient and accurate for lumped systems with a large number of ports; however, they were not suitable for distributed transmission-line networks. In this paper, an LM-based approach is proposed for modeling distribut... View full abstract»

• ### CRLH–CRLH C-Section Dispersive Delay Structures With Enhanced Group-Delay Swing for Higher Analog Signal Processing Resolution

Publication Year: 2012, Page(s):3939 - 3949
Cited by:  Papers (19)
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A novel dispersive delay structure (DDS) based on a composite right/left-handed (CRLH)-CRLH coupler is proposed and demonstrated by both full-wave and experimental results. The experimental prototypes are compact and shielded multilayer DDSs implemented in low-temperature co-fired ceramics technology. Compared to the conventional all-pass C-section DDS, the proposed CRLH C-section DDS exhibit a la... View full abstract»

• ### Multistage Directional Filter Based on Band-Reject Filter With Isolation Improvement Using Composite Right-/Left-Handed Transmission Lines

Publication Year: 2012, Page(s):3950 - 3958
Cited by:  Papers (3)
| |PDF (1556 KB) | HTML

The λ/2 strip-resonator directional filter has good balance between compactness and robustness against manufacturing error. However, there have been difficulties in generalizing the strip-resonator directional filter to realize multipole filtering responses. This paper presents the theory, experiments, and improvement of a new structure of strip-resonator directional filter based on a band-... View full abstract»

• ### Nonreciprocal Tunable Low-Loss Bandpass Filters With Ultra-Wideband Isolation Based on Magnetostatic Surface Wave

Publication Year: 2012, Page(s):3959 - 3968
Cited by:  Papers (16)
| |PDF (1799 KB) | HTML

A new type of nonreciprocal C -band magnetic tunable bandpass filter (BPF) with ultra-wideband (UWB) isolation is presented. The BPF was designed with a 45° rotated yttrium iron garnet (YIG) slab loaded on an inverted-L-shaped microstrip transducer pair. With external in-plane magnetic fields from 1.1 to 1.9 kOe, the central frequency of the filter was tuned from 5.2 to 7.5 GHz, with... View full abstract»

• ### Triple-Conductor Combline Resonators for Dual-Band Filters With Enhanced Guard-Band Selectivity

Publication Year: 2012, Page(s):3969 - 3979
Cited by:  Papers (11)  |  Patents (5)
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Novel combline resonators and filters with enhanced dual-band characteristics are introduced in this paper. The proposed resonator is made up of three metallic conductors: an inner post, an intermediate conductor, and an enclosure. This structure provides two asynchronous resonant modes that can be used for realizing compact microwave dual-band filters. Such dual-band filters offer the low cost, c... View full abstract»

• ### Narrowband Microwave Filters With Mixed Topology

Publication Year: 2012, Page(s):3980 - 3987
Cited by:  Papers (11)
| |PDF (1678 KB) | HTML

Narrowband microwave filters exhibiting transmission zeros in the response (either imaginary and/or complex) can be typically designed with cross-coupled or extracted pole topologies. These configurations have advantages and disadvantages that must be carefully considered during the choice of a specific topology. In some cases, however, it may be convenient to choose a mixed topology, i.e., part o... View full abstract»

• ### Inline Pseudoelliptic ${rm TE}_{01delta}$-Mode Dielectric Resonator Filters Using Multiple Evanescent Modes to Selectively Bypass Orthogonal Resonators

Publication Year: 2012, Page(s):3988 - 4001
Cited by:  Papers (18)  |  Patents (1)
| |PDF (2575 KB) | HTML

A new class of dielectric resonator filters with in-line structure and pseudoelliptic response is presented in this paper. The basic idea consists of using TE01δ single-mode resonators cascaded along an evanescent mode waveguide and oriented along orthogonal directions. By exploiting multiple evanescent modes, which can alternatively excite or bypass a resonator depending on its ... View full abstract»

• ### A $Ka$ -Band Fully Tunable Cavity Filter

Publication Year: 2012, Page(s):4002 - 4012
Cited by:  Papers (33)
| |PDF (2037 KB) | HTML

A TE011Ka-band tunable filter with a stable and continuous tuning performance is presented in this paper. Both bandwidth and center-frequency tunability are demonstrated by cascading six-pole pseudo-low-pass and pseudo-high-pass tunable filters. A novel mode-splitter resonator and coupling configuration enabling cross-coupled planar TE011 filter realization is introduc... View full abstract»

• ### Multiphysics Modeling of RF and Microwave High-Power Transistors

Publication Year: 2012, Page(s):4013 - 4023
Cited by:  Papers (8)
| |PDF (2449 KB) | HTML Media

In this paper, we present a multiphysics approach for the simulation of high-power RF and microwave transistors, in which electromagnetic, thermal, and nonlinear transistor models are linked together within a harmonic-balance circuit simulator. This approach is used to analyze a laterally diffused metal-oxide-semiconductor (LDMOS) transistor that has a total gate width of 102 mm and operates at 2.... View full abstract»

• ### Characterization and Modeling of an SiGe HBT Technology for Transceiver Applications in the 100–300-GHz Range

Publication Year: 2012, Page(s):4024 - 4034
Cited by:  Papers (14)
| |PDF (3132 KB) | HTML

This paper describes a methodology for extracting and verifying the high-frequency model parameters of the HICUM L0 and L2 models of a silicon-germanium HBT from device and circuit measurements in the 110-325-GHz range. For the first time, the non-quasi-static effects, missing in the HICUM/L0 model, are found to be essential in accurately capturing the frequency dependence of the transistor maximu... View full abstract»

• ### Resistive Graphene FET Subharmonic Mixers: Noise and Linearity Assessment

Publication Year: 2012, Page(s):4035 - 4042
Cited by:  Papers (14)  |  Patents (1)
| |PDF (1025 KB) | HTML

We report on the first complete RF characterization of graphene field-effect transistor subharmonic resistive mixers in the frequency interval fRF=2-5 GHz . The analysis includes conversion loss (CL), noise figure (NF), and intermodulation distortion. Due to an 8-nm thin Al2O3 gate dielectric, the devices operate at only ~ 0 dBm of local oscillator (LO) powe... View full abstract»

• ### High-Efficiency Harmonically Terminated Diode and Transistor Rectifiers

Publication Year: 2012, Page(s):4043 - 4052
Cited by:  Papers (73)
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This paper presents a theoretical analysis of harmonically terminated high-efficiency power rectifiers and experimental validation on a class-C single Schottky-diode rectifier and a class- F-1 GaN transistor rectifier. The theory is based on a Fourier analysis of current and voltage waveforms, which arise across the rectifying element when different harmonic terminations are presented a... View full abstract»

• ### Passive Subharmonic Generation Using Memoryless Nonlinear Circuits

Publication Year: 2012, Page(s):4053 - 4065
| |PDF (3652 KB) | HTML

A passive subharmonic generation and frequency downconversion method using a memoryless nonlinear circuit coupled to a linear passive resonator is presented. The frequency downconverter can be used to transfer the energy from a high-frequency signal to a lower frequency without requiring any dc power supply. In the synchronous mode, the passive downconverter acts as a self-powered frequency divide... View full abstract»

• ### Analysis and Design of Millimeter-Wave Low-Voltage CMOS Cascode LNA With Magnetic Coupled Technique

Publication Year: 2012, Page(s):4066 - 4079
Cited by:  Papers (21)
| |PDF (3538 KB) | HTML

In this paper, the design and analysis of CMOS low-noise amplifiers (LNAs) with a magnetic coupled technique in different cascode topologies are proposed. To minimize the noise figure (NF) and the supply voltage, and to guarantee large 3-dB bandwidth, transformers are designed and placed between the transistors of the cascode devices. Three low supply voltage and wideband LNAs are designed, fabric... View full abstract»

• ### 4–12- and 25–34-GHz Cryogenic mHEMT MMIC Low-Noise Amplifiers

Publication Year: 2012, Page(s):4080 - 4088
Cited by:  Papers (9)
| |PDF (3043 KB) | HTML

In this paper, monolithic microwave integrated circuit (MMIC) broadband low-noise amplifiers (LNAs) for cryogenic applications based on a 100-nm metamorphic high-electron mobility transistor (mHEMT) technology in combination with grounded coplanar waveguide are reported. A three-stage LNA, operating in 4-12 GHz and cooled to 15 K exhibits an associated gain of 31.5 dB ± 1.8 dB and average n... View full abstract»

• ### A Wideband RF Power Amplifier in 45-nm CMOS SOI Technology With Substrate Transferred to AlN

Publication Year: 2012, Page(s):4089 - 4096
Cited by:  Papers (16)
| |PDF (1753 KB) | HTML

A wideband radio frequency power amplifier (RF PA) is implemented with a stack of 16 low-breakdown-voltage thin-oxide transistors in a standard 45-nm CMOS SOI technology. A combination of dynamic-biasing and stacking prevents all breakdown mechanisms when the PA operates under large voltage swings and facilitates an output impedance close to 50 Ω without a need for an output-matching networ... View full abstract»

• ### PA Efficiency and Linearity Enhancement Using External Harmonic Injection

Publication Year: 2012, Page(s):4097 - 4106
Cited by:  Papers (13)
| |PDF (2432 KB) | HTML

This paper presents analysis and experimental demonstration of a high-efficiency linear power amplifier (PA) with second-harmonic injection at the output. In this circuit, the transistor is not driven hard into compression and does not produce significant harmonic content. External injection at the output enables voltage and current wave-shaping to achieve high efficiency. Theoretical analysis of ... View full abstract»

• ### Design of Broadband Highly Efficient Harmonic-Tuned Power Amplifier Using In-Band Continuous Class- ${hbox{F}}^{-1}/{hbox{F}}$ Mode Transferring

Publication Year: 2012, Page(s):4107 - 4116
Cited by:  Papers (47)
| |PDF (2080 KB) | HTML

A novel methodology for designing high-frequency broadband harmonic-tuned power amplifiers (PAs) is presented in this paper. Specifically, a hybrid PA mode, transferring between continuous inverse Class-F and continuous Class-F, is for the first time employed to design PAs with optimal performance over more than-an-octave bandwidth. A GaN PA is designed and realized based on this mode-transferring... 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..

Full Aims & Scope

## Meet Our Editors

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

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