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# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 23 of 23

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
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• ### Simple and Effective Extrapolation Technique for Neural-Based Microwave Modeling

Publication Year: 2010, Page(s):301 - 303
Cited by:  Papers (2)
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This letter presents a simple and effective technique allowing neural network based microwave models to be used outside their training range. Our technique detects necessity of extrapolation inside each hidden neuron and performs extrapolation using a modified neuron activation function. Compared to existing techniques, the proposed technique is easy to implement and the extrapolation result is eq... View full abstract»

• ### Formula Derivation and Verification of Characteristic Impedance for Offset Double-Sided Parallel Strip Line (DSPSL)

Publication Year: 2010, Page(s):304 - 306
Cited by:  Papers (12)
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Double-sided parallel strip line (DSPSL) is a versatile microwave transmission line. With an offset, it allows for large variations of the characteristic impedance and therefore flexibility for the design of novel microwave devices. In this letter, a formula for the characteristic impedance of DSPSL is derived by the fuzzy EM method and verified by commercial software. Very good agreement is obser... View full abstract»

• ### Extraction of Unloaded Q and Coupling Matrix From Measurements on Filters With Large Losses

Publication Year: 2010, Page(s):307 - 309
Cited by:  Papers (16)
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In this letter, a simple solution is described for obtaining an accurate evaluation of the coupling matrix and the unloaded Q from the measured scattering parameters of a microwave lossy filter (assuming all the resonators with the same unloaded Q). The Cauchy method is applied in a predistorted frequency domain, where the measured (lossy) parameters refer to a lossless device. In this way, it bec... View full abstract»

• ### Compact Lowpass Filters With Sharp and Expanded Stopband Using Stepped Impedance Hairpin Units

Publication Year: 2010, Page(s):310 - 312
Cited by:  Papers (34)
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This letter presents a novel compact lowpass filter with two transmission zeros. By tap-connecting the stepped-impedance hairpin unit, two transmission zeros can be generated when an interdigital structure is introduced between the two low-impedance sections. Further, the two transmission zeros can be adjusted easily to obtain a larger zero separation without the need to change the stepped-impedan... View full abstract»

• ### Compact Wideband Bandstop Filter With Four Transmission Zeros

Publication Year: 2010, Page(s):313 - 315
Cited by:  Papers (40)
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This work presents a new type of compact wideband bandstop filter (BSF) with four transmission zeros in the stopband. The proposed filter topology consists of a coupled line directional coupler connected in parallel to an interference transmission line. The filter characteristics can be easily controlled by the coupling factor of the coupled line coupler and the characteristic admittances of both ... View full abstract»

• ### Ultra-Wideband Bandpass Filter With Improved Upper Stopband Performance Using Defected Ground Structure

Publication Year: 2010, Page(s):316 - 318
Cited by:  Papers (24)
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A novel ultra-wideband (UWB) bandpass filter (BPF) with improved upper stopband performance using a defected ground structure (DGS) is presented in this letter. The proposed BPF is composed of seven DGSs that are positioned under the input and output microstrip line and coupled double step impedance resonator (CDSIR). By using CDSIR and open loop defected ground structure (OLDGS), we can achieve U... View full abstract»

• ### Design of Miniaturized Microstrip Dual-Mode Filter With Source-Load Coupling

Publication Year: 2010, Page(s):319 - 321
Cited by:  Papers (17)
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A miniaturized microstrip dual-mode filter with different responses is developed in this letter. A coupling and routing scheme is presented to model the operations of this filter. The new filter reduces the occupied area up to 33% compared with the conventional one at 1.89 GHz. Meanwhile, the proposed circuit enables the second harmonic response to be effectively suppressed. A demonstrator filter ... View full abstract»

• ### Side-Coupled Shorted Microstrip Line for Compact Quasi-Elliptic Wideband Bandpass Filter Design

Publication Year: 2010, Page(s):322 - 324
Cited by:  Papers (16)
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This letter presents a novel structure composed of a shorted quarter-wavelength microstrip line side-coupled to two open-ended stubs. The proposed topology exhibits a quasi-elliptic wideband response with two transmission zeros enhancing the selectivity. To verify the design concept, one filter example has been designed, fabricated and measured. Good insertion/return losses, flat group delay, shar... View full abstract»

• ### Dual-Band Bandpass Filter Using Parallel Short-Ended Feed Scheme

Publication Year: 2010, Page(s):325 - 327
Cited by:  Papers (17)
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In this letter, a compact dual-band (DB) bandpass filter based on parallel short-ended feed scheme is presented. Two sets of quarter-wavelength resonators operating at diverse frequencies are adopted to generate DB responses. A special feed scheme is proposed, which consists of two parallel short-ended strip branches. Each of them acts as a feed line of the respective resonator at one passband and... View full abstract»

• ### Design of Substrate Integrated Waveguide Transversal Filter With High Selectivity

Publication Year: 2010, Page(s):328 - 330
Cited by:  Papers (14)
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A substrate integrated waveguide (SIW) transversal bandpass filter (BPF) using Modified Doublet (MD) with high selectivity is presented in this letter. The modified doublet contains two resonators that are not coupled to each other. However, the source and the load are directly coupled in order to generate two transmission zeros. By changing the sign of one coupling coefficient and detuning the re... View full abstract»

• ### Compact Planar Magic-T Using E-Plane Substrate Integrated Waveguide (SIW) Power Divider and Slotline Transition

Publication Year: 2010, Page(s):331 - 333
Cited by:  Papers (17)
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A novel planar magic-T using an E-plane substrate integrate waveguide (SIW) power divider and a SIW-slotline transition is proposed in this letter. Due to the metal ground between the two input/output ports, the E-plane SIW power divider has a 180?? reverse phase characteristic. A SIW-slotline transition is utilized to realize the H-plane input/output port of the magic-T. Good agreement between th... View full abstract»

• ### 30 GHz CMOS Self-Oscillating Mixer for Self-Heterodyne Receiver Application

Publication Year: 2010, Page(s):334 - 336
Cited by:  Papers (4)
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A 30 GHz CMOS-based self-oscillating mixer (SOM) is demonstrated for millimeter-wave self-heterodyne receiver applications. When injection-locked by transmitted LO carrier, the SOM provides constant and sufficient LO power for mixing process independent of transmitted LO power level. The SOM based on the cross-coupled VCO architecture is realized in 0.13 ??m CMOS process. It has down-conversion lo... View full abstract»

• ### A 5.8 GHz Low-Phase-Noise LC-QVCO Using Splitting Switched Biasing Technique

Publication Year: 2010, Page(s):337 - 339
Cited by:  Papers (11)
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A 5.8 GHz LC-tank quadrature voltage-controlled oscillator (QVCO) is proposed for achieving low phase noise. Phase noise contributed by the tank voltage amplitude and the 1/f noise of the tail transistors were simultaneously improved when the splitting switched biasing technique was adopted. Measured results showed a tuning range from 5.09 to 6.15 GHz, a phase noise of -119.39 dBc/Hz at an offset ... View full abstract»

• ### A Wide-Tuning Dual-Band Transformer-Based Complementary VCO

Publication Year: 2010, Page(s):340 - 342
Cited by:  Papers (8)
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A dual-band wide-tuning range complementary LC-VCO is reported that utilizes additive and subtractive coupling of transformer inductances. Complementary circuitry in the VCO enables the frequency tuning range to be extended with boosted positive loop gains. Implemented in 65 nm CMOS, the measured results show frequency tuning range of 56% and 33% at 7.5 and 18.25 GHz center frequency, respectively... View full abstract»

• ### A 0.18 $mu$ m CMOS Quadrature VCO Using the Quadruple Push-Push Technique

Publication Year: 2010, Page(s):343 - 345
Cited by:  Papers (13)
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This letter presents a new quadrature voltage-controlled oscillator (QVCO), which consists of two complementary cross-coupled voltage-controlled oscillators (VCOs) with two tail inductors. The two differential VCOs are coupled via two tail inductors to form a quadrature VCO. The proposed CMOS QVCO has been implemented with the TSMC 0.18 μm CMOS technology and the die area is 0.83 × 0.... View full abstract»

• ### A 2.1 to 6 GHz Tunable-band LNA With Adaptive Frequency Responses by Transistor Size Scaling

Publication Year: 2010, Page(s):346 - 348
Cited by:  Papers (3)
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A 2.1 to 6 GHz tunable-band LNA by using transistor-size scaling technique is realized in 90 nm CMOS technology, which adopts a scalable-size transistor mimicked by the parallel-connected transistors with binary weighted device sizes. In the 16 programmable bands located in the frequencies of interest, the S21 varies in the range from 15.1 to 16.9 dB, and the NF is from 2.16 to 2.81 dB. This tunab... View full abstract»

• ### A Compact Ku-Band SiGe Power Amplifier MMIC With On-Chip Active Biasing

Publication Year: 2010, Page(s):349 - 351
Cited by:  Papers (7)  |  Patents (1)
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A Ku-band power amplifier monolithic microwave integrated circuit (MMIC) with an output power density of 726 mW/mm2 is demonstrated using 0.25 ??m SiGe BiCMOS technology. No inductor matching scheme is applied to minimize the MMIC size, but an active biasing topology is used to enhance the power-added efficiency (PAE) and linearity of the MMIC. The fabricated one-stage cascode power amp... View full abstract»

• ### A Multi-Level and Multi-Band Class-D CMOS Power Amplifier for the LINC System in the Cognitive Radio Application

Publication Year: 2010, Page(s):352 - 354
Cited by:  Papers (22)  |  Patents (9)
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In this letter, a multi-level and multi-band Class-D CMOS power amplifier (PA) in a standard 0.18 ??m CMOS process is presented. Using multiple PMOS devices with control switches, the proposed PA improves efficiency with the multi-level operation. In order to enable the multi-band operation, the proposed PA employs a tunable series resonator. The measured maximum drain efficiencies were 72% and 70... View full abstract»

• ### A 0.93-mA Spur-Enhanced Frequency Synthesizer for L1/L5 Dual-Band GPS/Galileo RF Receiver

Publication Year: 2010, Page(s):355 - 357
Cited by:  Papers (7)
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A versatile frequency synthesizer for a L1/L5 dual-band GPS/Galilleo dual-mode RF receiver is designed with a 0.13 ??m CMOS process. For spur reduction, a simple low-glitch charge-pump circuit (CPC) is proposed in this letter. The fabricated chip achieves the in-band phase noise of -92 dBc/Hz and the spur performance of -71.23 dBc at 8.184 MHz offset from 1.571 GHz carrier with a second-order loop... View full abstract»

• ### Fiber Bragg Grating Based Wireless Sensor Module With Modulated Radio-Frequency Signal

Publication Year: 2010, Page(s):358 - 360
Cited by:  Papers (3)
| | PDF (400 KB) | HTML

A fiber Bragg grating (FBG) sensing scheme based on the measurement of radio-frequency (RF) signal is presented for wireless sensing applications. A fiber ring combined with multiple sensing FBGs is proposed to form a microwave photonic notch filter based sensor module. With an additional FBG as a tunable reference element, the modulated RF signal in the sensor module is utilized to interrogate th... 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