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# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 23 of 23
• ### Table of contents

Publication Year: 2010, Page(s):C1 - C4
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• ### IEEE Microwave and Wireless Components Letters publication information

Publication Year: 2010, Page(s): C2
| PDF (44 KB)
• ### Green's Function Calculation for a Line Source Exciting a 2-D Periodic Printed Structure

Publication Year: 2010, Page(s):181 - 183
Cited by:  Papers (4)
| | PDF (392 KB) | HTML

The electromagnetic field excited by an electric line source in the presence of a printed structure periodic along two directions with arbitrary geometry of the metallization is calculated. The Array Scanning Method (ASM) is adopted to express the field excited by the aperiodic source in terms of an integral superposition of suitable auxiliary Floquet-periodic fields. The latter are solutions of e... View full abstract»

• ### An Improved Split-Step Method in Scaling Function Based MRTD

Publication Year: 2010, Page(s):184 - 186
Cited by:  Papers (1)
| | PDF (472 KB) | HTML

A split-step method with four sub-steps is applied to the multiresolution time-domain scheme and combined with the dispersion-error control parameters. From the discussed numerical dispersion, it is obvious that the phase velocity an- isotropic error and absolute error of the introduced method are much lower than alternating direction implicit and the original split-step MRTD method. The results s... View full abstract»

• ### Variance Weighted Vector Fitting for Noisy Frequency Responses

Publication Year: 2010, Page(s):187 - 189
Cited by:  Papers (6)
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This letter presents a modification of the Vector Fitting algorithm to estimate rational models of frequency responses affected by noise, e.g. in the case of measured data. It is based on the use of a least-squares weighting function that contains information about the variance of the data samples used in the macromodeling process. The modification is straightforward and does not increase the comp... View full abstract»

• ### On the Application of Dimensional Analysis to Parametric Macromodeling

Publication Year: 2010, Page(s):190 - 192
Cited by:  Papers (1)
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Fast parametric macromodeling techniques are important for the design and analysis of microwave structures. Standard approaches in the literature are often limited to problems with a moderate amount of parameters, since the complexity of the problem grows exponentially with the number of dimensions. This letter investigates the use of dimensional analysis as a means to reduce the dimensionality of... View full abstract»

• ### An Improved Equivalent Circuit Model for CSRR-Based Bandpass Filter Design With Even and Odd Modes

Publication Year: 2010, Page(s):193 - 195
Cited by:  Papers (7)
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We present a new equivalent circuit model that incorporates the resonances and transmission zeros in terms of even and odd modes for CSRR-based bandpass filter (BPF) design. The circuit model and three resonance characteristics are consistent with the geometry of the CSRR-based BPF. The variations of distance ratio, related gap and loop number are investigated. The good performance of lower insert... View full abstract»

• ### A New Dual-Band Microstrip Bandpass Filter Using Net-Type Resonators

Publication Year: 2010, Page(s):196 - 198
Cited by:  Papers (35)
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In this letter, a new dual-band microstrip bandpass filter is developed using net-type resonators. The net-type resonator is designed to simultaneously operate at two closely specified resonant frequencies, f1 and f2, and then applied to construct a dual-band filter based on the filter design concept of adding extra coupled resonators. The dual-band filter with the elliptic f... View full abstract»

• ### Design of Dual-Passband Microstrip Bandpass Filters With Multi-Spurious Suppression

Publication Year: 2010, Page(s):199 - 201
Cited by:  Papers (21)
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A systematic design method for microstrip bandpass filters with both dual-passband response and multi-spurious suppression is proposed in this letter. The filter is composed of stepped impedance resonators (SIRs). A novel asymmetric SIR structure is proposed to effectively increase the degree of freedom in the dual-passband bandwidth design. As a consequence, the transmission zero of the coupling ... View full abstract»

• ### Quasi-Elliptic UWB Bandpass Filter Using Multilayer Liquid Crystal Polymer Technology

Publication Year: 2010, Page(s):202 - 204
Cited by:  Papers (13)
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A novel ultra-wideband (UWB) bandpass filter (BPF) with quasi-elliptic response using non-uniform periodical structures is presented. In the design, a periodical unit structure is proposed and studied, which can provide transmission zeros at both lower and upper stopbands to improve the selectivity. The proposed periodical unit structure consists of broadside coupling patches, slotted ground and e... View full abstract»

• ### $W$ -Band Bandpass Filter Using Micromachined Air-Cavity Resonator With Current Probes

Publication Year: 2010, Page(s):205 - 207
Cited by:  Papers (17)  |  Patents (1)
| | PDF (373 KB) | HTML

This letter presents a W -band micromachined air-cavity bandpass filter (BPF) using a novel integration method of a micromachined silicon air-cavity resonator with silicon pillars. With silicon pillars, which were fabricated simultaneously with a deep reactive ion etching process for forming a cavity structure, a micromachined silicon air-cavity can be easily integrated on a package substra... View full abstract»

• ### Compact Low-Loss Reconfigurable Bandpass Filter With Switchable Bandwidth

Publication Year: 2010, Page(s):208 - 210
Cited by:  Papers (14)
| | PDF (271 KB) | HTML

A reconfigurable bandpass filter (BPF) is presented using a resonator with switchable number of transmission poles at 1.5 GHz. The resonator consists of a uniform resonator, a p-i-n diode, and an open loop. The diode is used to connect/isolate the open loop to/from the uniform resonator. When the open loop is loaded, the resonator has three transmission poles, and the BPF achieves a wideband respo... View full abstract»

• ### Experimental Analysis of a 60 GHz Compact EC-CPW Branch-Line Coupler for mm-Wave CMOS Radios

Publication Year: 2010, Page(s):211 - 213
Cited by:  Papers (18)
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A 60 GHz reduced-size branch-line coupler has been developed using elevated-center coplanar waveguide (EC-CPW) transmission lines. The coupler is fabricated in a 90 nm CMOS technology and has a chip area of 0.102 mm2. The measurements indicated an amplitude-imbalance of 0.7 dB and a phase difference of 88 degrees at 60 GHz, a return loss of greater than 15 dB at every port over the 60 G... View full abstract»

• ### Microwave Corona Breakdown Prediction in Arbitrarily-Shaped Waveguide Based Filters

Publication Year: 2010, Page(s):214 - 216
Cited by:  Papers (4)
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This letter describes an efficient algorithm to predict the RF gas breakdown power threshold in microwave devices with complex geometries. The two necessary calculations when investigating such a phenomenon have been performed: on the one hand, the computation of the electromagnetic fields inside the structure and, on the other hand, the determination of the breakdown onset itself. The electromagn... View full abstract»

• ### A Novel Meander-Grooved Polarization Twist Reflector

Publication Year: 2010, Page(s):217 - 219
Cited by:  Papers (2)
| | PDF (305 KB) | HTML

A novel broadband polarization twist reflector using a meander-grooved conducting plane is proposed in this study. A genetical swarm optimization (GSO) technique was utilized to achieve the broadband design of the meander-grooved polarization twist reflector for Ku-band applications. Measured reflection coefficients are shown to be in good agreement with the simulated results. The optimized design... View full abstract»

• ### A W-Band Highly Linear SiGe BiCMOS Double-Balanced Active Up-Conversion Mixer Using Multi-Tanh Triplet Technique

Publication Year: 2010, Page(s):220 - 222
Cited by:  Papers (15)
| | PDF (351 KB) | HTML

This letter presents a W-band highly linear double- balanced active up-conversion mixer implemented in a low-cost 200 GHz fT and fmax 0.18 ??m SiGe BiCMOS process. Linearization technique based on multi-tanh triplet principle is used to improve the linearity of the transconductanace stage. An integrated active frequency doubler and on-chip balun are used at LO port and RF por... View full abstract»

• ### A 7.9 GHz Low-Power PMOS Colpitts VCO Using the Gate Inductive Feedback

Publication Year: 2010, Page(s):223 - 225
Cited by:  Papers (10)
| | PDF (399 KB) | HTML

A low-power PMOS Colpitts voltage controlled oscillator (VCO) topology using the technique of gate inductive feedback is demonstrated. The topology enhances the negative conductance and overcomes the start-up difficulty of the conventional Colpitts VCO. This enables the Colpitts VCO to be operated in low-power consumption. The fabricated VCO operates from 7.4 to 7.9 GHz with 7% tuning range, a pow... View full abstract»

• ### A Broadband High Efficiency High Output Power Frequency Doubler

Publication Year: 2010, Page(s):226 - 228
Cited by:  Papers (10)
| | PDF (430 KB) | HTML

An 8 to 30 GHz broadband high efficiency, high output power frequency doubler using 0.5 ??m AlGaAs/InGaAs enhancement-mode pseudomorphic high electronic mobility transistor process is presented in this paper. A common-gate/common-source field effect transistor pair is employed in the balanced doubler. With an input power of 8 dBm, this work features a conversion gain of better than -4 dB with a fu... View full abstract»

• ### A 90 nm CMOS LC-Tank Divide-by-3 Injection-Locked Frequency Divider With Record Locking Range

Publication Year: 2010, Page(s):229 - 231
Cited by:  Papers (26)  |  Patents (2)
| | PDF (447 KB) | HTML

This letter proposes a wide-locking range divide-by-3 injection-locked frequency divider fabricated in the 90 nm 1P9M CMOS technology. The divider consists of an nMOS cross-coupled p-core Armstrong LC oscillator and a center-tapped inductor in series with the pMOSFETs. The pMOSFETs are used as a linear and second harmonic mixer. At the supply voltage of 1 V, the free-running frequency is from 7.84... View full abstract»

• ### Output Power Control in Class-E Power Amplifiers

Publication Year: 2010, Page(s):232 - 234
Cited by:  Papers (15)  |  Patents (1)
| | PDF (574 KB) | HTML

A technique is presented to facilitate power control of cascode class-E power amplifiers (PAs). It is shown that by controlling the signal applied to the gate of the cascode transistor, the transmit power is changed. The main advantage of the proposed technique is a high 36 dB output power control range (PCR) compared to 20 dB for the traditional approach. This fulfills the requirements of the GSM... View full abstract»

• ### A Dual Band CMOS Receiver With Hybrid Down Conversion Mixer for IEEE 802.11a/b/g/n WLAN Applications

Publication Year: 2010, Page(s):235 - 237
Cited by:  Papers (5)
| | PDF (632 KB) | HTML

A low power dual band fully integrated receiver incorporating IEEE 802.11a/b/g/n WLAN standards was manufactured using 0.13 ??m CMOS technology. In this letter, the proposed hybrid mixer, which uses both double- and direct-conversion architecture, operates in the 5 GHz band in order to eliminate the need for high LO frequency generators. This hybrid mixer is a small low power device that shares a ... View full abstract»

• ### SiGe HBT-Based Active Cold Load for Radiometer Calibration

Publication Year: 2010, Page(s):238 - 240
Cited by:  Papers (9)
| | PDF (162 KB) | HTML

An active cold load (ACL) using SiGe heterojunction bipolar transistor (HBT) has been realized at L-band for radiometer calibration. A hybrid circuit has been realized with a discrete transistor, lumped elements and microstrip transmission lines. The ACL exhibits return loss higher than 30 dB and a noise temperature less than 65 K in the L- band (1400-1427 MHz). The ambient temperature sensitivity... View full abstract»

• ### IEEE Microwave and Wireless Components Letters information for authors

Publication Year: 2010, Page(s): C3
| PDF (34 KB)

## Aims & Scope

The IEEE Microwave and Wireless Components Letters (MWCL) publishes three page papers that focus on microwave theory, techniques and applications as they relate to components, devices, circuits, biological effects, and systems involving the generation, modulation, demodulation, control, transmission, and detection of microwave signals.

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## Meet Our Editors

Editor in Chief
N. Scott Barker
Dept. Elect. Comp. Eng.
University of Virginia
Charlottesville, VA 22904
barker@virginia.edu
dsk6n@virginia.edu