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# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 25 of 27
• ### Table of contents

Publication Year: 2009, Page(s):C1 - C4
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• ### IEEE Microwave and Wireless Components Letters publication information

Publication Year: 2009, Page(s): C2
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• ### Variability on the Propagation of a Plane Wave Using Stochastic Collocation Methods in a Bio Electromagnetic Application

Publication Year: 2009, Page(s):185 - 187
Cited by:  Papers (7)
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In this letter, the uncertainties on the angles of propagation of a plane wave in a bio electromagnetic application are studied using two non intrusive stochastic collocation methods. The proposed techniques are used in this application, which employs a finite-difference time-domain scheme, but they can be used when applying other kinds of methods without modifying programs. The results obtained u... View full abstract»

• ### Two-Section Cascaded Coupled Line Wilkinson Power Divider for Dual-Band Applications

Publication Year: 2009, Page(s):188 - 190
Cited by:  Papers (38)
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A coupled line based design method is presented for the dual-band operation of the Wilkinson power divider. It is shown that a simple two-section cascaded coupled line structure is capable of the dual-band operation in the Wilkinson power divider. The overall divider structure can be simplified with the small number of transmission line sections and the coupled line using the proposed approach. View full abstract»

• ### A Compact Wide-Band Rat-Race Hybrid Using Microstrip Lines

Publication Year: 2009, Page(s):191 - 193
Cited by:  Papers (31)  |  Patents (1)
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A compact microstrip rat-race hybrid with a 50% bandwidth employing space-filling curves is reported in this letter. The footprint of the proposed design occupies 31% of the area of the conventional similar design. Across the frequency bandwidth, the maximum amplitude unbalance is 0.5 dB, the phase variation is plusmn5deg , the isolation is better than 25 dB and the return loss is great... View full abstract»

• ### DMSLR-Based Bandpass Filter With Hilbert-Curve Perturbation for Multiple Resonances and Wideband Applications

Publication Year: 2009, Page(s):194 - 196
Cited by:  Papers (6)
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The dual-mode square loop resonator with Hilbert-curve perturbation is introduced for multiple resonances and wideband filters in this letter. To obtain low insertion loss (0.5 dB), high out-of-band rejection level (-49.51 dB) and wider band (BW 65%) filters, iterative Hilbert-curve perturbation and space-filling technique are proposed. Multiple resonances that included dual modes, third, fourth, ... View full abstract»

• ### Open Complementary Split Ring Resonators (OCSRRs) and Their Application to Wideband CPW Band Pass Filters

Publication Year: 2009, Page(s):197 - 199
Cited by:  Papers (68)
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In this letter, open complementary split ring resonators (OCSRRs) are introduced for the first time. Such resonators are the dual counterparts of the open split ring resonators (OSRRs), introduced in 2004 by some of the authors, and consist on a pair of concentric hooks etched on a metal layer in opposite orientation. It is shown in the letter that OCSRRs can be modeled by means of an LC parallel ... View full abstract»

• ### A W-Band Air-Cavity Filter Integrated on a Thin-Film Substrate

Publication Year: 2009, Page(s):200 - 202
Cited by:  Papers (6)
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In this letter, a W-band air-cavity filter has been developed on a thin-film substrate using a lossy silicon substrate as a base plate, which is suitable for a mm-wave system-on-package. The lossy silicon suppresses a parasitic substrate mode excited in a thin-film substrate, while a coupling loss between a transmission line and a resonator is minimized by etching the backside of the lossy silicon... View full abstract»

• ### A Low Loss X-Band Quasi-Elliptic Ferroelectric Tunable Filter

Publication Year: 2009, Page(s):203 - 205
Cited by:  Papers (20)
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A compact high quality factor four-pole X-band tunable quasi-elliptic bandpass filter is presented in this letter. The filter is enabled by high-Q ferroelectric barium strontium titanate capacitors and open-loop resonators. The central frequency of 8.35 GHz and the frequency tuning range of 500 MHz (6%) are achieved with a dc bias voltage of 30 V. The selective filter has a fractional 1 dB bandwid... View full abstract»

• ### Moldable Polymer/Ferrite Composite and Application to an Integrated CPW Tunable Phase Shifter

Publication Year: 2009, Page(s):206 - 208
Cited by:  Papers (3)
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A moldable polymer/ferrite composite (MPFC), easily moldable into arbitrary volumetric shapes is presented. The composite material is produced at room temperature and does not require any postprocessing treatment. The utility of the MPFC is demonstrated in a meandrous coplanar waveguide line phase shifter tuned by an applied magnetic dc field. Due to its low cost and high flexibility, the proposed... View full abstract»

• ### Echo-Free and Crosstalk-Free Transmission in Particular Interconnections

Publication Year: 2009, Page(s):209 - 211
Cited by:  Papers (3)  |  Patents (4)
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We explore several designs for implementing the special ZXtalk method for completely degenerate interconnections, capable of providing reduced echo and internal crosstalk in multiconductor interconnections. Transmission circuits comprising a MIMO series-series feedback amplifier are adequate to obtain a wide bandwidth. The external crosstalk may also be reduced, using an additional conductor to ob... View full abstract»

• ### Millimeter-Wave Multibeam Antenna Based on Eight-Port Hybrid

Publication Year: 2009, Page(s):212 - 214
Cited by:  Papers (32)
| | PDF (499 KB) | HTML

A simple and successful design for 1-D and 2-D multibeam antenna on a single substrate is presented at 30 GHz based on the eight-port hybrid. They can generate 4 beams in one plane and 2 times 2 beams in two orthogonal planes, respectively. Substrate integrated waveguide is applied in the construction of these circuits by normal printed circuit board process. The measurements demonstrate good perf... View full abstract»

• ### The Island-Gate Varactor—A High-Q MOS Varactor for Millimeter-Wave Applications

Publication Year: 2009, Page(s):215 - 217
Cited by:  Papers (7)  |  Patents (1)
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A new accumulation MOS varactor with island-shaped poly gate layout is proposed to improve the quality factor ( Q-factor) at high frequency, which can be readily employed for CMOS-based millimeter-wave applications. Measured results up to 67 GHz show significant improvements in the Q-factor and the series resistance Rs over the conventional multi-finger MOS varactors with the same groun... View full abstract»

• ### Active Quasi-Circulator MMIC Using OTAs

Publication Year: 2009, Page(s):218 - 220
Cited by:  Papers (18)
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A very compact, active quasi-circulator is proposed and experimentally demonstrated in this work. It consists of an active balun and a current combiner using operational transconductance amplifiers in CMOS. Experimental results show that the insertion loss between the circulation ports is low and all three ports have input reflection coefficients below -10 dB. The chip operates from 1.5 to 2.7 GHz... View full abstract»

• ### Low Spurious, Broadband Frequency Translator Using Left-Handed Nonlinear Transmission Line

Publication Year: 2009, Page(s):221 - 223
Cited by:  Papers (2)  |  Patents (2)
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In this letter, we present a frequency translator based on a left-handed nonlinear transmission line (LH NLTL). The proposed LH NLTL can achieve a very linear phase variation as a function of applied dc bias for a broadband frequency that facilitates a low spurious, broadband frequency translation. Our experiment demonstrates that the LH NLTL enables frequency shift with 30 dB maximum spurious sup... View full abstract»

• ### An Active IF Balun for a Doubly Balanced Resistive Mixer

Publication Year: 2009, Page(s):224 - 226
Cited by:  Papers (10)
| | PDF (501 KB) | HTML

In this letter, we present a wideband active intermediate frequency (IF) balun for a doubly balanced resistive mixer implemented using a 0.5 mum GaAs pHEMT process. The 0.3 times 0.5 mm2 IF balun was realized through a DC-coupled differential amplifier in order to extend IF frequency of the mixer to DC. The measured amplitude and phase imbalances were less than 1 dB and 5deg, respective... View full abstract»

• ### A K-Band High-Gain Down-Conversion Mixer in 0.18 $mu$m CMOS Technology

Publication Year: 2009, Page(s):227 - 229
Cited by:  Papers (6)
| | PDF (212 KB) | HTML

A high gain CMOS down conversion mixer with a gain enhancement technique is presented. This technique includes negative resistance generation, parasitic capacitance cancellation and current-injection. These are implemented with an additional circuitry. This mixer has a conversion gain of 9.12 dB, input 1 dB compression point of -11 dBm at 24 GHz, while consuming 16.2 mW from 1.8 V supply. Between ... View full abstract»

• ### CMOS Colpitts Quadrature VCO Using the Body Injection-Locked Coupling Technique

Publication Year: 2009, Page(s):230 - 232
Cited by:  Papers (28)  |  Patents (2)
| | PDF (828 KB) | HTML

This paper presents a new low phase noise quadrature voltage-controlled oscillator (QVCO), which consists of two differential complementary Colpitts voltage-controlled oscillators (VCOs) with a tail inductor. The output of the tail inductor in one differential VCO is injected to the bodies of the nMOSFETs in the other differential VCO and vice versa. The proposed CMOS QVCO has been implemented wit... View full abstract»

• ### A 5.6 GHz Low Power Balanced VCO in 0.18 $mu$m CMOS

Publication Year: 2009, Page(s):233 - 235
Cited by:  Papers (24)
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A 5.6 GHz balanced voltage-controlled oscillator (VCO) is designed and implemented in a 0.18 mum CMOS 1P6M process. It consists of two single-ended complementary Colpitts LC-tank VCOs coupled by two pairs of varactors. At the supply voltage of 1.2 V, the output phase noise of the VCO is -119.13 dBc/Hz at 1MHz offset frequency from the carrier frequency of 5.6 GHz, and the figure of merit is -190.2... View full abstract»

• ### A Tail-Injected Divide-by-4 SiGe HBT Injection Locked Frequency Divider

Publication Year: 2009, Page(s):236 - 238
Cited by:  Papers (20)  |  Patents (1)
| | PDF (630 KB) | HTML

This letter presents a silicon-germanium (SiGe) heterojunction bipolar transistor (HBT) divide-by-4 injection locked frequency divider (ILFD). The ILFD is based on a single-stage voltage-controlled oscillator with active-inductor, and was fabricated in the 0.35 mu m SiGe 3P3M BiCMOS technology. The divide-by-4 function is performed by injecting a signal to the base of the tail HBT. Measurement res... View full abstract»

• ### A CMOS Multi-Phase Injection-Locked Frequency Divider for V-Band Operation

Publication Year: 2009, Page(s):239 - 241
Cited by:  Papers (6)
| | PDF (261 KB) | HTML

An inductor-less injection-locked frequency divider for high-speed frequency synthesis at V-band is presented. It achieves division by six and operates up to 65 GHz. In addition, it can achieve division ratios of four and two when 44 GHz or 22 GHz input signals are applied, respectively. Implemented in a 0.13 mum digital CMOS technology, the divider draws an average current of 18 mA, and the core ... View full abstract»

• ### A MMIC Doubler Based on Novel Open/Short Stub Hybrids

Publication Year: 2009, Page(s):242 - 244
| | PDF (297 KB) | HTML

A new configuration of a balanced frequency PHEMT monolithic microwave integrated circuit doubler using open/short stub hybrids is proposed. With multi-coupled lines technology, the phase shifter is produced and applied to a Ka-band doubler successfully. As compared to the conventional lumped-element doubler, this phase shifter can make the doubler more compact in size and flexible in design. The ... View full abstract»

• ### A 3–8 GHz Low-Noise CMOS Amplifier

Publication Year: 2009, Page(s):245 - 247
Cited by:  Papers (20)
| | PDF (351 KB) | HTML

A wideband CMOS low-noise amplifier (LNA) is proposed by using the concept of mutual coupling technique implemented through a symmetric center-tap inductor. A frequency widening network is designed with a center-tap inductor at the input and the output of an LNA to achieve bandwidth extension with a single stage amplifier. The proposed wideband low noise amplifier is implemented in the 0.18 mum CM... View full abstract»

• ### True Broadband Technique for On-Chip-Series Connection of TWAs Using Differential Distributed Amplifiers

Publication Year: 2009, Page(s):248 - 250
Cited by:  Papers (3)
| | PDF (330 KB) | HTML

A new technique for series connection of monolithic broadband travelling wave amplifiers (TWAs) is presented, using differential distributed architectures. This technique is intrinsically broadband because no series capacitor is used, it starts operating at dc up to cut-off frequency. With a GaAs heterojunction bipolar transistor monolithic microwave integrated circuit process, two on-chip-series ... View full abstract»

• ### Highly Rugged 30 GHz GaN Low-Noise Amplifiers

Publication Year: 2009, Page(s):251 - 253
Cited by:  Papers (8)
| | PDF (387 KB) | HTML

GaN low-noise amplifiers (LNAs) operating at 27-31 GHz are presented in this letter. The monolithically integrated LNAs were fabricated using the process line of the Ferdinand-Braun-Institut. Noise figures of 3.7 to 3.9 dB were measured. The ruggedness of the LNAs was verified by noise measurements after stressing the LNA for up to 2 h with up to 33 dBm of input power. These conditions are among t... View full abstract»

## 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