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# IEEE Transactions on Microwave Theory and Techniques

## Filter Results

Displaying Results 1 - 25 of 33

Publication Year: 2011, Page(s):C1 - C4
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• ### IEEE Transactions on Microwave Theory and Techniques publication information

Publication Year: 2011, Page(s): C2
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• ### Temporal Pulse Compression Beyond the Fourier Transform Limit

Publication Year: 2011, Page(s):2173 - 2179
Cited by:  Papers (14)
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It is a generally known that the Fourier transform limit forbids a function and its Fourier transform to both be sharply localized. Thus, this limit sets a lower bound to the degree to which a band-limited pulse can be temporally compressed. However, seemingly counterintuitive waveforms have been theoretically discovered, which, across finite time intervals, vary faster than their highest frequenc... View full abstract»

• ### Understanding Anomalous Extraordinary Transmission From Equivalent Circuit and Grounded Slab Concepts

Publication Year: 2011, Page(s):2180 - 2188
Cited by:  Papers (17)
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In this paper, we perform an analysis of anomalous extraordinary transmission (ET) through hole arrays in a rectangular lattice. This phenomenon is a peak of high or even total transmission when the polarization is parallel to the short periodicity of the hole array, and it only happens when the perforated plate is backed by a dielectric slab. The analysis is done using equivalent circuit concepts... View full abstract»

• ### Analysis of Dispersion and Losses in Helically Corrugated Metallic Waveguides by 2-D Vector Finite-Element Method

Publication Year: 2011, Page(s):2189 - 2196
Cited by:  Papers (8)
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Hollow metallic circular waveguides with helical corrugation of the inner surface (helical waveguides) attract considerable interest for various applications such as interaction regions in gyrotron traveling-wave tubes and as a dispersive medium for passive microwave pulse compression. In this paper, we employ a vector finite-element method in 2-D formulation for computation of the dispersion, att... View full abstract»

• ### Efficient and Systematic Solution of Real and Complex Eigenvalue Problems Employing Simplex Chain Vertices Searching Procedure

Publication Year: 2011, Page(s):2197 - 2205
Cited by:  Papers (3)
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This paper presents a novel method that is very efficient in solving multidimensional real and complex eigenvalue problems, commonly employed in electromagnetic analysis, which can be transformed into a nonlinear equation. The concept is realized as root tracing process of a real or complex function of N variables in the constrained space. We assume that the roots of the continuous function... View full abstract»

• ### Improved Design of Single-Section and Cascaded Planar Directional Filters

Publication Year: 2011, Page(s):2206 - 2213
Cited by:  Papers (6)
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An improved analysis and design of single-section and cascaded planar directional filters is addressed, based on approximate and exact microwave circuit analyses, and the resulting characteristics of matching, coupling, band elimination, and isolation are investigated. The effects of finite even-mode reactance and the unavoidable loss of capacitively coupled parallel branch are also studied. It is... View full abstract»

• ### Compact Second-Order Highly Linear Varactor-Tuned Dual-Mode Filters With Constant Bandwidth

Publication Year: 2011, Page(s):2214 - 2220
Cited by:  Papers (28)
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This paper presents a compact highly linear tunable second-order quasi-elliptic filter with constant 3-dB bandwidth. The proposed filter is thoroughly analyzed to clearly describe the filter equivalent circuit and the tuning mechanism involved. In addition, the tunable resonator configuration employed is shown to improve filter linearity, especially for low bias voltages where distortion is normal... View full abstract»

• ### Novel Design Method of Tri-Band Power Divider

Publication Year: 2011, Page(s):2221 - 2226
Cited by:  Papers (8)
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A novel method is presented for the design of a multiband power divider. The method employs network theory and even-odd-mode analysis to derive the equivalent input and output port admittances of a three-port junction, which is based on the conditions of reciprocity, isolation, and matching. If an impedance transformer that transforms the equivalent admittance to normalized unit conductance at mul... View full abstract»

• ### A Compact Dual-Band 90° Coupler With Coupled-Line Sections

Publication Year: 2011, Page(s):2227 - 2232
Cited by:  Papers (40)
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A new dual-band 90° coupler using coupled transmission lines is proposed in this paper. As the coupler consists of only three quarter-wave coupled-line sections, it occupies less circuit area as compared to other existing dual-band branch-line couplers. A desired dual-band operation can be achieved by proper design of the coupling level for those coupled-line sections. Moreover, the coupler... View full abstract»

• ### A Miniaturized and Broadband Balun Using Artificial Coupled Line With Imaginary Even-Mode Impedance

Publication Year: 2011, Page(s):2233 - 2240
Cited by:  Papers (2)
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A broadband and miniaturized balun is proposed using the artificial coupled line with the imaginary even-mode impedance. The artificial coupled line is a metamaterial transmission line with zero electrical length for the even-mode excitation, whereas it behaves like a TEM transmission line with approximately constant characteristic impedance for the odd-mode excitation. Based on the artificial cou... View full abstract»

• ### Design of a Mutual Coupling Compensation Network for a Small Receiving Monopole Array

Publication Year: 2011, Page(s):2241 - 2245
Cited by:  Papers (8)
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The design of a new mutual coupling compensation network for a small and compact-size receiving monopole array is presented. This is the first example for the experimental realization of mutual coupling compensation in a receiving array by using the receiving mutual impedances. The compensation network is designed on a printed circuit board substrate using only passive circuit components to minimi... View full abstract»

• ### A Consistent Charge Model of GaAs MESFETs for $Ku$-Band Power Amplifiers

Publication Year: 2011, Page(s):2246 - 2253
Cited by:  Papers (4)
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In this paper, a consistent gate charge model for GaAs MESFETs based upon charge conservation is proposed for monolithic microwave integrated circuit power amplifier designs. This new model is capable of accurately modeling the transistor under various biasing conditions. The conventional approaches for charge modeling of GaAs MESFETs usually adopt analytical equations to fit nonlinear gate capaci... View full abstract»

• ### A 6-bit Fully Binary Digital-to-Analog Converter in 0.25-$\mu{\hbox {m}}$ SiGe BiCMOS for Optical Communications

Publication Year: 2011, Page(s):2254 - 2264
Cited by:  Papers (6)
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This paper presents an approach to implement a high-speed binary weighted digital-to-analog converter (DAC). A different current switching mechanism is proposed that improves the dynamic performance of binary weighted DACs. Circuit simulation shows an improvement of the rise (fall) time mismatch by a factor of 2 over the conventional structure. It is shown that in a conventional high-speed binary ... View full abstract»

• ### A Novel Frequency Control Loop for Tunable Notch Filters

Publication Year: 2011, Page(s):2265 - 2274
Cited by:  Papers (5)  |  Patents (3)
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In this paper, a novel frequency control loop system for tunable notch filters is presented. The frequency control loop is designed for automatically tuning a microelectromechancial systems tunable notch filter, which has 22-dB rejection in the notch band and less than 0.8-dB insertion loss over a 5-MHz passband bandwidth in the International Mobile Telecommunications band (2.1 GHz). The filter fr... View full abstract»

• ### 1.58-GHz Third-Order CMOS Active Bandpass Filter With Improved Passband Flatness

Publication Year: 2011, Page(s):2275 - 2284
Cited by:  Papers (15)  |  Patents (1)
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This paper presents a third-order active bandpass filter (BPF), realized in an area of 0.58% λ0 by 0.44% λ0 at 1.58 GHz (not including contact pads and λ0 is the free-space wavelength at 1.58 GHz) using standard 0.18-μm CMOS one-poly six-metal technology. A survey of the literature shows that a prototype of such a BPF has the lowest norm... View full abstract»

• ### Design of Wideband LNAs Using Parallel-to-Series Resonant Matching Network Between Common-Gate and Common-Source Stages

Publication Year: 2011, Page(s):2285 - 2294
Cited by:  Papers (16)
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A method is proposed to design wideband low-noise amplifiers (LNAs) made of cascaded common-gate (CG) and common-source (CS) stages with a parallel-to-series resonant interstage matching network. The first CG stage has a dual-band response, and the second CS stage has higher gain between these two bands. By applying the proposed interstage matching technique, conjugate matching is achieved at high... View full abstract»

• ### Increasing Doherty Amplifier Average Efficiency Exploiting Device Knee Voltage Behavior

Publication Year: 2011, Page(s):2295 - 2305
Cited by:  Papers (23)
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This contribution presents the theoretical analysis and design guidelines to increase the average efficiency of a Doherty power amplifier (DPA), accounting for the device on-resistance. Starting from a simplified device model, closed-form equations for the estimation of both design parameters and obtainable performances are reported. Moreover, advantages and disadvantages of the approach are deepl... View full abstract»

• ### A 2.5-V Low-Reference-Voltage 2.8-V Low- Collector–Voltage Operation 0.8–0.9-GHz Broadband CDMA BiFET Power Amplifier With an Input SPDT Band Select Switch

Publication Year: 2011, Page(s):2306 - 2317
Cited by:  Papers (4)
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This paper describes circuit design and measurement results of a bipolar field-effect transistor monolithic microwave integrated circuit power amplifier (PA) module operating with a 2.5-V low reference voltage (Vref) and a 2.8-V low collector supply voltage (Vcc). While covering 824-925-MHz broadband CDMA operation at 2.8 V of Vcc, the PA allow... View full abstract»

• ### A 16-kV HBM RF ESD Protection Codesign for a 1-mW CMOS Direct Conversion Receiver Operating in the 2.4-GHz ISM Band

Publication Year: 2011, Page(s):2318 - 2330
Cited by:  Papers (6)
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A decreasing-sized π -model electrostatic discharge (ESD) protection structure is presented and applied to protect against ESD stresses at the RF input pad of an ultra-low power CMOS front-end operating in the 2.4-GHz industrial-scientific-medical band. The proposed ESD protection structure is composed of a pair of ESD devices located near the RF pad, another pair close to the core circuit,... View full abstract»

• ### Accuracy Criterion for $S$-Matrix Reconstruction Transforms on Multiport Networks

Publication Year: 2011, Page(s):2331 - 2339
Cited by:  Papers (2)
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S-matrix reconstruction transforms are based on two stages of matrix transformation to remove the mismatch-induced errors. Over the years, these transforms are widely used in measurements of multiport devices using a two-port vector network analyzer, especially for noncoaxial applications because high-quality matched loads are hardly accessible. In this paper, analytical error analysis of t... View full abstract»

• ### All-Optical Microwave Photonic Filter Based on Electrooptic Phase Modulator and Detuned Wavelength Division De-Multiplexer

Publication Year: 2011, Page(s):2340 - 2349
Cited by:  Papers (3)
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We theoretically and experimentally investigate a microwave photonic filter with an electrooptic phase modulator and an array waveguide grating, which acts as a detuned two-channel wavelength division de-multiplexer. In the experiment, a microwave notch filter with a QN factor of 236 and a rejection ratio of 31 dB is obtained by introducing microwave subtraction directly in optical domain. ... View full abstract»

• ### Tunable Carrier Generation and Broadband Data Upconversion for RoF Systems Based on Stimulated Brillouin Scattering

Publication Year: 2011, Page(s):2350 - 2356
Cited by:  Papers (14)
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We present a frequency-tunable RF carrier generation and broadband data upconversion technique for radio-over-fiber (RoF) systems. A dual-parallel Mach-Zehnder modulator is used to realize single-mode modulation (SMM). On the other hand, frequency-tunable RF carrier generation with single-sideband (SSB) modulation is performed using stimulated Brillouin scattering (SBS) with three types of configu... View full abstract»

• ### Analysis of the Signal Response of a Scanning-Beam Millimeter-Wave Correlation Radiometer

Publication Year: 2011, Page(s):2357 - 2368
Cited by:  Papers (4)
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An analysis of the response of a scanning-beam millimeter-wave correlation radiometer is presented with an emphasis on the spectral signal response. The derivation and subsequent analysis presented here focuses specifically on the effects of the natural oscillation of the signal, called the fringe frequency, as it pertains to rotating sensors. The amplitude and bandwidth of the spectral density ar... View full abstract»

• ### Corrections to “A Two-Channel 8–20-GHz SiGe BiCMOS Receiver With Selectable IFs for Multibeam Phased-Array Digital Beamforming Applications” [Mar 11 716-726]

Publication Year: 2011, Page(s): 2369
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In the above titled paper (ibid., vol. 59, no. 3, pp. 716-726, Mar. 2011), "EVM" is used as an acronym for both "evanescent-mode" and "error vector magnitude" causing confusion. Clarification of the text is presented here. 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