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# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 25 of 31

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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• ### Efficient Implementation for the Unconditionally Stable 2-D WLP-FDTD Method

Publication Year: 2009, Page(s):677 - 679
Cited by:  Papers (20)
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This letter presents an efficient algorithm for the unconditionally stable two-dimensional finite-difference time-domain method with weighted Laguerre polynomials (2-D WLP-FDTD). The huge sparse matrix equation is solved with a factorization-splitting scheme. This leads to much less CPU time and memory storage than those in the conventional implementation. To verify the accuracy and efficiency of ... View full abstract»

• ### Millimeter Wave Characterization of a Catadioptric Lens for Imaging Applications

Publication Year: 2009, Page(s):680 - 682
Cited by:  Papers (2)
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Characterization of a catadioptric dielectric lens-horn configuration for short-range sensing and imaging is presented. The focusing property is investigated both numerically and experimentally at 108 GHz. The lens-horn provides a focal spot of ~ 0.9 lambda at a distance of ~ 4.5 lambda. An imaging example employing the lens in a CW imaging setup is presented. A test pattern was imaged and a marke... View full abstract»

• ### A Novel Triple-Band Microstrip Branch-Line Coupler With Arbitrary Operating Frequencies

Publication Year: 2009, Page(s):683 - 685
Cited by:  Papers (11)
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This letter presents a novel microstrip branch-line coupler operating in three frequency bands. The design methodology of the triple-band branch-line coupler is established by using a compensation technique to improve the matching property within each passband region. The proposed coupler with compact size is realized by folded microstrip open-circuited and short-circuited stubs. The measured, ful... View full abstract»

• ### Characterization of Average Power Handling Capability of Bandpass Filters Using Planar Half-Wavelength Microstrip Resonators

Publication Year: 2009, Page(s):686 - 688
Cited by:  Papers (10)
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Several closed-form equations are obtained for characterizing the average power handling capability (APHC) of bandpass filters (BPFs) using planar half-wavelength open-circuited microstrip resonators. It is found that the temperature rise (TR) of the BPF is the product of two terms corresponding to the single microstrip resonator and the filter, respectively. The APHC of an eighth-order open-loop ... View full abstract»

• ### Elliptic-Function CPW Low-Pass Filters Implemented by Means of Open Complementary Split Ring Resonators (OCSRRs)

Publication Year: 2009, Page(s):689 - 691
Cited by:  Papers (14)
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In this letter, an elliptic low-pass filter (LPF) implemented in coplanar waveguide (CPW) technology by etching open complementary split ring resonators (OCSRRs) in the central strip is presented for the first time. The OCSRRs behave as series connected parallel resonant tanks, whereas metallic patches etched in the back side of the substrate provide the required shunt capacitance to achieve the e... View full abstract»

• ### Compact UWB Bandpass Filter Based on Signal Interference Techniques

Publication Year: 2009, Page(s):692 - 694
Cited by:  Papers (48)
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This letter presents a new type of compact ultra-wideband (UWB) bandpass filter (BPF) based on interference techniques. The structure is formed by a short-ended coupled line coupler connected in parallel to a transmission line. The transmission and reflection zeros of the filter can be controlled through the analytical equations and rules given. To validate the suggested filter scheme, the design,... View full abstract»

• ### Harmonic-Suppressed Bandpass Filter Based on Discriminating Coupling

Publication Year: 2009, Page(s):695 - 697
Cited by:  Papers (35)
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This letter presents a novel method to suppress harmonic responses of parallel-coupled bandpass filters. The harmonic suppression is based on discriminating coupling. The coupling coefficient at fundamental resonant frequency can be tuned to desirable values whereas it is zero at the second harmonic. Hence, the coupling region blocks the second harmonic but still allows the transmission of signals... View full abstract»

• ### Compact Dual-Mode Open Loop Microstrip Resonators and Filters

Publication Year: 2009, Page(s):698 - 700
Cited by:  Papers (50)
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A novel compact microstrip dual-mode resonator and filter are proposed. The characteristics of the dual mode resonator are investigated. It is found that the filter response exhibits a desirable stopband response where the first spurious passband naturally occurs at 3f0. Finally, methods of miniaturizing such resonators and filters are discussed. The proposed structure was able to achie... View full abstract»

• ### Novel Substrate Integrated Waveguide Filters With Mixed Cross Coupling (MCC)

Publication Year: 2009, Page(s):701 - 703
Cited by:  Papers (36)
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A new type of substrate integrated waveguide filter with mixed cross coupling (MCC) is proposed, with its mechanism of generating extra transmission zeros using MCC investigated. Less mixed coupling is needed to obtain the same number of transmission zeros in comparison with inline filters, with good agreements obtained between the measured and the simulated S-parameters of the developed filters. View full abstract»

• ### An HTS Wideband Filter Using Interdigital-Like Resonators at UHF Band

Publication Year: 2009, Page(s):704 - 706
Cited by:  Papers (2)
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A wideband superconducting interdigital-like filter at UHF band has been successfully designed and fabricated. An interdigital-like resonator is proposed to realize both strong coupling and compact size. A ten-pole demonstration high temperature superconducting filter is developed with a center frequency of approximately 340 MHz and a fractional bandwidth of 26%. The measurements show that the ins... View full abstract»

• ### UHF Band Ultra-Narrowband Superconducting Filter With Double U-Type Secondary Coupling Structure

Publication Year: 2009, Page(s):707 - 709
Cited by:  Papers (6)
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A double U-type secondary coupling structure (DUSCS) is used for a compact ultra-narrowband filter in the ultra-high frequency (UHF) band. It can effectively reduce the coupling and thus spacing between coupled twin-spiral resonators. A six-pole superconducting filter at 600 MHz with a fractional bandwidth of 0.083% is designed and fabricated to validate this technique. The filter size is reduced ... View full abstract»

• ### MEMS-Based Tunable LC Bandstop Filter With an Ultra-Wide Continuous Tuning Range

Publication Year: 2009, Page(s):710 - 712
Cited by:  Papers (16)
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This letter presents a new microelectromechanical system-based tunable LC filter that utilizes a tunable capacitor and a tunable inductor in a single device. An electrically floating metal plate is located between the tunable capacitor and the tunable inductor. As the floating metal plate is thermally moved and used commonly for both the capacitor and inductor, the device provides an ultra-wide co... View full abstract»

• ### Deembedding Accuracy for Device Scale and Interconnection Line Parasitics

Publication Year: 2009, Page(s):713 - 715
Cited by:  Papers (1)
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In this letter, we investigate the deembedding accuracy of open-short (OS) and pad-open-short (POS) deembedding for transistor measurement and modeling. It is found that all of the transistor intrinsic element values except for the gate-resistance, Rg , are independent of the deembedding procedure. Furthermore, the difference in Rg is dependent on the device size. To analyze the orig... View full abstract»

• ### A 2.45/5.2 GHz Image Rejection Mixer With New Dual-Band Active Notch Filter

Publication Year: 2009, Page(s):716 - 718
Cited by:  Papers (5)
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A 2.45/5.2 GHz dual-band Gilbert downconversion mixer with image rejection function is presented, which is implemented using the 0.18 mum CMOS technology. The proposed differential dual-band image rejection circuitry is employed for the 2.45/5.2 GHz WLAN application to effectively diminish the DC power consumption and complexity of circuit design compared to the traditional Hartley or Weaver archi... View full abstract»

• ### A Weak-Inversion Low-Power Active Mixer for 2.4 GHz ISM Band Applications

Publication Year: 2009, Page(s):719 - 721
Cited by:  Papers (8)
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This work describes a fully integrated active mixer designed in 0.18 mum CMOS technology for 2.4 GHz industrial, scientific and medical (ISM) band applications. The mixer uses a source driven local oscillator (LO) to integrate the RF-LO buffering with the active mixer, and weakly inverted input MOSFETs to improve the gain and noise performance. The double-balanced quadrature mixer has a measured c... View full abstract»

• ### A Low Voltage and Low Power Bottom-Series Coupled Quadrature VCO

Publication Year: 2009, Page(s):722 - 724
Cited by:  Papers (15)
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This letter presents a new low power quadrature voltage-controlled oscillator (QVCO), which consists of two complementary cross-coupled voltage-controlled oscillators (VCOs) with split-source tail inductors. The bottom-series coupling transistors are in parallel with the tail inductors and require no DC voltage headroom. The proposed CMOS QVCO has been implemented with the TSMC 0.18 mum CMOS techn... View full abstract»

• ### A 40 GHz Differential Push-Push VCO in 0.18 $mu{rm m}$ CMOS for Serial Communication

Publication Year: 2009, Page(s):725 - 727
Cited by:  Papers (6)
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A 40 GHz differential CMOS push-push VCO is proposed for high-frequency applications. It is shown analytically that the phase noise of the VCO output at the full-rate frequency is close to 6 dB higher than that of the half-rate frequency. The result of the phase noise analysis is verified by simulations and measurements. A phase noise of - 101 dBc/Hz was achieved at 1 MHz offset frequency. The pro... View full abstract»

• ### A DC-21 GHz Low Imbalance Active Balun Using Darlington Cell Technique for High Speed Data Communications

Publication Year: 2009, Page(s):728 - 730
Cited by:  Papers (15)  |  Patents (2)
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A DC-21 GHz low imbalance active balun using a 2 mum InGaP/GaAs HBT process is presented in this letter for high speed data communications. A Darlington cell is adopted to enhance 3 dB bandwidth of the proposed active balun. A feedback capacitor is designed to compensate the phase error between differential output ports caused by the different number of stages. The proposed active balun achieves a... View full abstract»

• ### IF Amplifier Section in 90 nm CMOS Technology for SoC Microwave Radiometers

Publication Year: 2009, Page(s):731 - 733
Cited by:  Papers (10)
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In this letter a novel design solution in 90 nm CMOS technology is proposed for the IF amplifier, low-pass filter and square-law power detector of a system-on-chip (SoC) microwave radiometer. To minimize the number of off-chip components (just a single capacitor) the IF filter is based on an active gmC configuration, whereas the power detector exploits the MOS transistor non-linearity, ... View full abstract»

• ### A Wideband Low Noise Amplifier With 4 kV HBM ESD Protection in 65 nm RF CMOS

Publication Year: 2009, Page(s):734 - 736
Cited by:  Papers (15)  |  Patents (1)
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This study presents a wideband low noise amplifier (LNA) including electrostatic discharge (ESD) protection circuits using 65 nm CMOS with a gate oxide thickness of only ~ 2 nm. By co-designing the ESD blocks with the core circuit, the LNA shows almost no performance degradation compared to the reference design without ESD. Under a power consumption of only 6.8 mW, the silicon results show that th... View full abstract»

• ### A 3–10 GHz CMOS UWB Low-Noise Amplifier With ESD Protection Circuits

Publication Year: 2009, Page(s):737 - 739
Cited by:  Papers (14)
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A low-power fully integrated low-noise amplifier (LNA) with an on-chip electrostatic-static discharge (ESD) protection circuit for ultra-wide band (UWB) applications is presented. With the use of a common-gate scheme with a gm-boosted technique, a simple input matching network, low noise figure (NF), and low power consumption can be achieved. Through the combination of an input matching... View full abstract»

• ### Dedicated Large-Signal GaN HEMT Model for Switching-Mode Circuit Analysis and Design

Publication Year: 2009, Page(s):740 - 742
Cited by:  Papers (8)
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A novel large-signal gallium nitride (GaN) high electron mobility transistor (HEMT) model that focuses on and improves analysis and design of switching-mode power amplifiers (PAs) is presented in this letter. The proposed model can be constructed using standard DC and AC characterization measurements and easily implemented in any computer-aided design (CAD) software to simulate and design switchin... View full abstract»

• ### A Transistor-Based Analog Predistorter With Unequal Delays for Memory Compensation

Publication Year: 2009, Page(s):743 - 745
Cited by:  Papers (4)
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A transistor-based analog predistorter (APD) with memory effect compensation is represented. The nonlinearity of a gain amplifier generated by a low supply voltage is used as an error generator. The predistorted signal by the unequal-delayed nonlinear paths improves the linearity by compensating for memory effects of the power amplifier (PA). For verification, the proposed APD with three-branch no... 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