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# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 42

Publication Year: 2013, Page(s):C1 - C4
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• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2013, Page(s): C2
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• ### Properties and Numerical Solutions of Dispersion Curves in General Isotropic Waveguides

Publication Year: 2013, Page(s):3161 - 3168
Cited by:  Papers (2)
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In this paper, some properties of dispersion curves in general isotropic piecewise homogeneous waveguides are rigorously derived. These properties are leveraged in a numerical implementation capable of determining the dispersion curves of such waveguides with cross-section materials that can be highly conductive (such as copper). In a numerical example, the influence of a lossy shielding conductor... View full abstract»

• ### Below-Cutoff Propagation in Metamaterial-Lined Circular Waveguides

Publication Year: 2013, Page(s):3169 - 3178
Cited by:  Papers (17)  |  Patents (1)
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This paper investigates the propagation characteristics of circular waveguides whose interior surface is coated with a thin metamaterial liner possessing dispersive, negative, and near-zero permittivity. A field analysis of this system produces the dispersion of complex modes, and reveals in detail intriguing phenomena such as backward-wave propagation below the unlined waveguide's fundamental-mod... View full abstract»

• ### Exact Cutoff Wavenumbers of Composite Elliptical Metallic Waveguides

Publication Year: 2013, Page(s):3179 - 3186
Cited by:  Papers (3)
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The cutoff wavenumbers of eccentric nonconfocal elliptical metallic waveguides are calculated in this paper. The solution is obtained using expansions in terms of the elliptical wave functions, in combination with the related addition theorem. The method presented here is exact, and allows the study of more complex elliptical waveguide geometries, like rotated elliptical interfaces arbitrarily pla... View full abstract»

• ### Compact Microstrip Dual-/Tri-/Quad-Band Bandpass Filter Using Open Stubs Loaded Shorted Stepped-Impedance Resonator

Publication Year: 2013, Page(s):3187 - 3199
Cited by:  Papers (43)
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This paper presents a new class of dual-, tri- and quad-band BPF by using proposed open stub-loaded shorted stepped-impedance resonator (OSLSSIR). The OSLSSIR consists of a two-end-shorted three-section stepped-impedance resistor (SIR) with two identical open stubs loaded at its impedance junctions. Two 50- Ω tapped lines are directly connected to two shorted sections of the SIR to serve as... View full abstract»

• ### Tunable Bandpass Filter With Independently Controllable Dual Passbands

Publication Year: 2013, Page(s):3200 - 3208
Cited by:  Papers (32)
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This paper presents a two-pole dual-band tunable bandpass filter (BPF) with independently controllable dual passbands based on a novel tunable dual-mode resonator. This resonator principally comprises a λ/2 resonator and two varactor diodes. One varactor is placed at the center of the resonator to determine the dominant even-mode resonant frequency; the other is installed between two ends o... View full abstract»

• ### Shorted-Ended Stepped-Impedance Dual-Resonance Resonator and Its Application to Bandpass Filters

Publication Year: 2013, Page(s):3209 - 3215
Cited by:  Papers (14)
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In this paper, a short-ended stepped-impedance dual-resonance resonator is presented. Analysis of its resonance characteristics is carried out, from which the design graph is given. By controlling the impedance and length ratios of the resonator, for the first time, the first three pairs of resonant modes corresponding to three passbands within a single resonator can be controlled freely in a wide... View full abstract»

• ### CAD Procedure for High-Performance Composite Corrugated Filters

Publication Year: 2013, Page(s):3216 - 3224
Cited by:  Papers (2)
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The design of waveguide low-pass filters is accomplished with a new method, where focus is on the upper stopband performance rather than passband or roll-off requirements. Using an efficient multimode variational formulation, composite filters are generated by direct optimization from an arbitrary number of partial corrugated subelements, each showing mutual TE10-mode passband and diffe... View full abstract»

• ### Multi-Frequency Impedance Transformers for Frequency-Dependent Complex Loads

Publication Year: 2013, Page(s):3225 - 3235
Cited by:  Papers (9)
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In this paper, a general synthesis method is proposed for the design of multi-frequency impedance transformers (MFITs) for arbitrary frequency-dependent complex loads (FDCLs) by adopting the concept of multi-frequency inverters (MFIs). An MFI, which is placed between two susceptance blocks, is constructed with a transmission line and two-side multi-frequency susceptances (MFSs), whose values at mu... View full abstract»

• ### High-Directivity MEMS-Tunable Directional Couplers for 10–18-GHz Broadband Applications

Publication Year: 2013, Page(s):3236 - 3246
Cited by:  Papers (4)
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This paper reports on two novel concepts of area-efficient ultra-wideband microelectromechanical systems (MEMS) reconfigurable coupled line directional couplers, whose coupling is tuned by mechanically changing the geometry of 3-D micromachined coupled transmission lines, utilizing integrated MEMS electrostatic actuators. Concept 1 is based on symmetrically changing the geometry of the ground coup... View full abstract»

• ### An In-Phase Output $K!a$-Band Traveling-Wave Power Divider/Combiner Using Double Ridge-Waveguide Couplers

Publication Year: 2013, Page(s):3247 - 3253
Cited by:  Papers (7)
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A Ka-band traveling-wave power divider/combiner, which is based on double ridge-waveguide couplers, is presented. The in-phase output, which is a challenge of the waveguide-based traveling-wave power divider, is achieved by optimizing the equivalent circuit of the proposed structure. The novel ridge-waveguide coupler has advantages of low loss, high power capability, and easy assembly. Finally, th... View full abstract»

• ### Theory and Design of Intrinsically Switched Multiplexers With Optimum Phase Linearity

Publication Year: 2013, Page(s):3254 - 3264
Cited by:  Papers (9)
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This paper presents the theory, design, and implementation of a new class of component called an intrinsically switched multiplexer, which is comprised of a number of contiguous bandpass filter channels that can be independently switched on and off with very low architecture-related insertion loss and flat group delay across adjacent switched-on channels. Coupled-resonator filter topologies are id... View full abstract»

• ### Analysis of Drain-Current Nonlinearity Using Surface-Potential-Based Model in GaAs pHEMTs

Publication Year: 2013, Page(s):3265 - 3270
Cited by:  Papers (4)
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In this paper, we present a physics-based model for accurate simulation of intermodulation distortion (IMD) in GaAs pseudomorphic HEMTs at 2 GHz. We combine the surface-potential-based drain-current model previously developed by us with the standard topology used in these devices for accurate nonlinear simulations. The proposed model is in excellent agreement with measured IMD data at multiple dc ... View full abstract»

• ### A Negative Feedback Looped Voltage-Controlled Ring Oscillator With Frequency Voltage Converter

Publication Year: 2013, Page(s):3271 - 3276
Cited by:  Papers (2)
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This paper proposes a negative feedback looped voltage-controlled ring oscillator (VCRO) with a frequency voltage converter (FVC) to suppress the phase noise. Measurement results of the negative feedback looped VCRO fabricated in a one-poly six-metal 1.8-V 0.18- μm CMOS process show that the phase noises are -90, -90, -94, -102, and -110 dBc/Hz at 1-kHz, 10-kHz 100-kHz, 1-MHz, and 10-MHz of... View full abstract»

• ### A Unified Method for the Analysis of Phase and Amplitude Noise in Electrical Oscillators

Publication Year: 2013, Page(s):3277 - 3284
Cited by:  Papers (6)
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This paper describes a unified method to quantify and compare amplitude and phase noise induced by white and colored noise sources in electrical oscillators. The proposed approach relies on the Floquet theory of linear time-varying systems and on the application of averaging techniques to simplify the stochastic equations. Closed-form expressions for the phase and amplitude power spectrum are prov... View full abstract»

• ### Noise Measurements of Discrete HEMT Transistors and Application to Wideband Very Low-Noise Amplifiers

Publication Year: 2013, Page(s):3285 - 3297
Cited by:  Papers (13)
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The noise models of InP and GaAs HEMTs are compared with measurements at both 300 and 20 K. The critical parameter, Tdrain, in the Pospieszalski noise model is determined as a function of drain current by measurements of the 1-GHz noise of discrete transistors with 50- Ω generator impedance. The dc I-V for the transistors under test are presented and effects of impact-ionization are noted. ... View full abstract»

• ### Impact of Nonlinear $C_{bc}$ on HBT Doherty Power Amplifiers

Publication Year: 2013, Page(s):3298 - 3307
Cited by:  Papers (11)
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Theoretically, the load modulation of carrier amplifiers in Doherty power amplifiers (PAs) achieves a 3-dB higher gain and a higher power-added efficiency (PAE) at a 3-dB back-off power due to the two times larger load impedance (2Ropt), compared to those at the peak power. In this paper, we analyze the impact of nonlinear Cbc on the gain behavior of heterojunction bipolar tr... View full abstract»

• ### A Doherty Architecture With High Feasibility and Defined Bandwidth Behavior

Publication Year: 2013, Page(s):3308 - 3317
Cited by:  Papers (27)  |  Patents (2)
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This paper presents a complete and rigorous theoretical investigation of a Doherty architecture with a novel output combining network. The benefits in terms of bandwidth and feasibility held by the proposed topology are investigated and compared with the conventional one. In particular, the theoretical analysis demonstrates that the proposed output combiner allows to implement a Doherty amplifier ... View full abstract»

• ### An Extended-Bandwidth Three-Way Doherty Power Amplifier

Publication Year: 2013, Page(s):3318 - 3328
Cited by:  Papers (16)
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This paper expounds a three-way Doherty power amplifier (3W-DPA) as a solution to the need for high-efficiency wideband power amplifiers when driven by multi-standard signals. The paper begins with a theoretical analysis of 3W-DPA architecture from which the governing equations are derived. This analysis enables the identification of circuit parameters for maximizing bandwidth. A comprehensive met... View full abstract»

• ### High-Efficient Hybrid Buck Converter With Switch-on-Demand Modulation and Switch Size Control for Wide-Load Low-Ripple Applications

Publication Year: 2013, Page(s):3329 - 3338
Cited by:  Papers (8)
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Considering the tradeoff between efficiency and output ripple over a wide load range, a monolithic dc-dc buck converter with switch-on-demand modulation (SODM) and switch size control (SSC) is presented in this paper. SODM achieves a hybrid mode of pulse skip and pulse width modulation (PWM) without mode detection circuit. The converter's on time is adaptively adjusted with the load demand, achiev... View full abstract»

• ### A 0.7–2.7-GHz Blocker-Tolerant Compact-Size Single-Antenna Receiver for Wideband Mobile Applications

Publication Year: 2013, Page(s):3339 - 3349
Cited by:  Papers (7)
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Passive-mixer-first receivers have recently demonstrated flexible, low-noise, and high-linearity performance. Likewise, capacitive coupling element antennas have been demonstrated to be a viable choice for mobile handset integration. This paper combines these two advances into a single-antenna wideband receiver that achieves a 0.7-2.7-GHz reception band. The compact-size wideband tunable antenna a... View full abstract»

• ### A 3.8-mW 3.5–4-GHz Regenerative FM-UWB Receiver With Enhanced Linearity by Utilizing a Wideband LNA and Dual Bandpass Filters

Publication Year: 2013, Page(s):3350 - 3359
Cited by:  Papers (10)
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A low-power regenerative frequency-modulated ultra-wideband (FM-UWB) receiver with wideband signal reception and linear FM-AM conversion is implemented in 65-nm CMOS for short-range communication systems. Different from the conventional regenerative FM-UWB receiver having the narrowband low-noise amplifier (LNA), the proposed receiver employs a wideband LNA and dual bandpass filters (BPFs) to impr... View full abstract»

• ### Design of Ultra-Low-Power 60-GHz Direct-Conversion Receivers in 65-nm CMOS

Publication Year: 2013, Page(s):3360 - 3372
Cited by:  Papers (12)
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This paper has explored an ultra-low-power design of two 60-GHz direct-conversion receivers in a 65-nm CMOS process for single-channel and multi-channel applications under the IEEE 802.15.3c standard, respectively. One subthreshold biasing 0.4-V transconductance mixer is designed with a compact quadrature hybrid coupler (160 μm × 210 μm with measured 3-dB intrinsic loss) in re... View full abstract»

• ### A CMOS Transmitter Leakage Canceller for WCDMA Applications

Publication Year: 2013, Page(s):3373 - 3380
Cited by:  Papers (9)
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A transmitter (TX) leakage canceller is proposed for improving the dynamic range of the receiver (RX) for wideband code division multiple access applications. A TX leakage canceller circuit in this paper is simple in implementation and has low noise figure (NF) contribution. It is a feed-forward canceller that samples a reference signal from the TX output and injects the amplitude-adjusted and pha... 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