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# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 22 of 22

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)
• ### Parametric Macromodeling for Tabulated Data Based on Internal Passivity

Publication Year: 2010, Page(s):533 - 535
Cited by:  Papers (3)
| | PDF (353 KB) | HTML

We present a new parametric macromodeling technique for admittance and impedance input-output representations parameterized by design variables such as geometric and material parameters. Stability and passivity of the parametric macromodel are guaranteed over a user defined range of design parameter values, while poles and residues are parameterized indirectly. Numerical results validate the propo... View full abstract»

• ### Silicon Filled Integrated Waveguides

Publication Year: 2010, Page(s):536 - 538
Cited by:  Papers (6)
| | PDF (310 KB) | HTML

In this letter, we report, for the first time, a silicon-filled integrated waveguide based on a two mask integrated circuit (IC) process and substrate transfer technique. The fabrication process offers a high degree of control and repeatability on the device geometrical dimensions. Waveguide structures with cutoff frequencies of 35, 50, and 77 GHz were designed and fabricated. In the fundamental T... View full abstract»

• ### Octave Bandwidth Compact Turnstile-Based Orthomode Transducer

Publication Year: 2010, Page(s):539 - 541
Cited by:  Papers (11)
| | PDF (320 KB) | HTML

A 64% instantaneous bandwidth scalable turnstile-based orthomode transducer to be used in the so-called extended C-band satellite link is presented. The proposed structure overcomes the current practical bandwidth limitations by adding a single-step widening at the junction of the four output rectangular waveguides. This judicious modification, together with the use of reduced-height waveguides an... View full abstract»

• ### A Miniaturized Dual-Mode Ring Bandpass Filter

Publication Year: 2010, Page(s):542 - 544
Cited by:  Papers (10)
| | PDF (491 KB) | HTML

A novel miniaturized dual-mode ring bandpass filter is proposed in this letter. The miniaturization is accomplished by slow-wave synthesized microstrip lines in an asymmetrical form. At the input/output ports, two saw-toothed coupling structures with quarter-wavelength open-circuited stubs are used to provide tight coupling. The miniaturized filter features a very compact size and the in-band resp... View full abstract»

• ### A Uniform Coupled-Line Dual-Band Filter With Different Bandwidths

Publication Year: 2010, Page(s):545 - 547
Cited by:  Papers (4)
| | PDF (440 KB) | HTML

This letter presents a planar dual-band bandpass filter (BPF) of adjustable bandwidths. The proposed method of simultaneously designing the J-inverters and the resonators enables a BPF to have bandwidth control, without any structural modification to the uniform coupled lines loaded with shunt stubs. A systematic design approach is introduced along with experimental results that verify the propose... View full abstract»

• ### Novel Ultra-Wideband Bandpass Filter Using Shorted Coupled Lines and Transversal Transmission Line

Publication Year: 2010, Page(s):548 - 550
Cited by:  Papers (43)
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A novel ultra-wideband (UWB) bandpass filter using two shorted coupled lines and a 270° transversal transmission line is proposed. The two shorted coupled lines are utilized to realize 180° phase inversion, while a folded transversal transmission line of 270° is introduced to perform as another power transmission path. Good impedance matching, UWB passband and wider upper stop... View full abstract»

• ### High Isolation and Compact Diplexer Using the Hybrid Resonators

Publication Year: 2010, Page(s):551 - 553
Cited by:  Papers (70)
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In this letter, a compact microstrip diplexer with very high output isolation is proposed. This diplexer consists of compact hybrid resonators, which are capable of introducing transmission zeros at desired frequencies and meanwhile suppressing signals below the resonant frequencies through tapping the feeding line close to the shorted vias. By designing the transmission zero of the lower-frequenc... View full abstract»

• ### Generation of Second and Fourth Harmonic Signals Using a Balanced Colpitts Oscillator With a Patch Antenna

Publication Year: 2010, Page(s):554 - 556
Cited by:  Papers (2)
| | PDF (363 KB) | HTML

A Colpitts oscillator that generates signal at 589 GHz using both phase superposition and nonlinearities of components is demonstrated in a 0.12 m SiGe BiCMOS process. This approach increases the ratio between fourth and second order harmonic power levels by more than 2 dB compared to that obtained using only linear phase superposition. The output power of this circuit with the highest operating f... View full abstract»

• ### 33–43 GHz and 66–86 GHz VCO With High Output Power in an 80 GHz ${rm f}_{rm T}$ SiGe HBT Technology

Publication Year: 2010, Page(s):557 - 559
Cited by:  Papers (10)
| | PDF (405 KB) | HTML

This letter presents a signal generation circuit that combines a wide tuning range voltage controlled oscillator (VCO) and a frequency doubler. The VCO provides two differential outputs with different power levels. A push-push frequency doubler is designed and cascaded to the high power output of the VCO, while the low power output is reserved to drive a frequency divider in a PLL. The VCO can be ... View full abstract»

• ### A 60 GHz Injection-Locked Frequency Tripler With Spur Suppression

Publication Year: 2010, Page(s):560 - 562
Cited by:  Papers (14)
| | PDF (471 KB) | HTML

A 60 GHz injection-locked frequency tripler is designed to improve spectral purity with spur suppression of the fundamental and the even-order harmonics. Several circuit designs are utilized in the harmonic current injection circuit to maximize the third-order harmonic and minimize the undesired harmonic current outputs, including notch filters and a capacitive cross-coupled transistor pair. With ... View full abstract»

• ### A 1–25 GHz GaN HEMT MMIC Low-Noise Amplifier

Publication Year: 2010, Page(s):563 - 565
Cited by:  Papers (20)
| | PDF (481 KB) | HTML

This letter presents an ultra-wideband low noise amplifier (LNA) using gallium-nitride (GaN) high-electron mobility transistors (HEMT) technology. A -3 dB bandwidth of 1-25 GHz with 13 dB peak power gain is achieved using a modified resistive-feedback topology. To obtain such a wide bandwidth, several bandwidth enhancement techniques are utilized. An inductor connected to the source of the input t... View full abstract»

• ### A Low Power Broadband Differential Low Noise Amplifier Employing Noise and IM3 Distortion Cancellation for Mobile Broadcast Receivers

Publication Year: 2010, Page(s):566 - 568
Cited by:  Papers (14)
| | PDF (175 KB) | HTML

A CMOS broadband differential low noise amplifier (LNA) employing noise and third order intermodulation (IM3) distortion cancellation has been designed using a 0.13 μm CMOS process for mobile TV tuners. By combining a common gate amplifier with a common source amplifier through a current mirror, a high gain due to the additional current amplification and a low noise figure (NF) due to the t... View full abstract»

• ### High Power Wideband Class-E Power Amplifier

Publication Year: 2010, Page(s):569 - 571
Cited by:  Papers (9)
| | PDF (226 KB) | HTML

This letter shows a high-power, high-efficiency, wideband Class-E RF power amplifier designed upon the load admittance synthesis concept and built using an uncomplicated low-loss load network with a low loss wideband admittance transformer as the main component. It uses a power Silicon LDMOS transistor to provide up to 145 W at 28 V peak power, up to 86% drain efficiency over 35% fractional bandwi... View full abstract»

• ### Dual-Mode High-Dynamic Range Class E HBT Power Amplifier for WCDMA EER Transmitter

Publication Year: 2010, Page(s):572 - 574
Cited by:  Papers (4)
| | PDF (624 KB) | HTML

This letter demonstrates a high-dynamic range GaAs heterojunction bipolar transistor Class E power amplifier (PA) for a WCDMA envelope elimination and restoration transmitter using a dual-mode amplification. An impedance optimization can operate the lossless high-power Class E mode and lossless low-power Class AB mode. This PA has a high dynamic range of -50 dBm to 27 dBm and obtains a remarkably ... View full abstract»

• ### Design of Active Circulators Using High-Speed Operational Amplifiers

Publication Year: 2010, Page(s):575 - 577
Cited by:  Papers (4)  |  Patents (1)
| | PDF (545 KB) | HTML

Design formulas and prototype realizations of an operational amplifier based active circulators operating from dc to 500 MHz are presented. The operational unit of the circulator consists of a chip-resistor based voltage divider and an Op Amp differential amplifier which can be easily fabricated at low cost for general low power applications. An existing widely used circuit is shown to be a specia... View full abstract»

• ### MMIC-Based Components for MM-Wave Instrumentation

Publication Year: 2010, Page(s):578 - 580
Cited by:  Papers (6)
| | PDF (649 KB) | HTML

In this letter, we present results of fully integrated 90-130 GHz receiver based on 100 nm mHEMT technology. The receiver contains a low noise amplifier (LNA), mixer and LO multiplier chain integrated into a single monolithic microwave integrated circuit (MMIC). The circuit is packaged into a waveguide block, characterized and compared to on-wafer measurements. Waveguide to microstrip transitions ... View full abstract»

• ### A Mixed-Signal Matching State Search Based Adaptive Antenna Tuning IC

Publication Year: 2010, Page(s):581 - 583
Cited by:  Papers (6)  |  Patents (2)
| | PDF (459 KB) | HTML

A closed-loop adaptive antenna tuning unit operating from 850 MHz-2 GHz for multi-band, multi-mode radios is presented. Unlike previous approaches, the proposed module utilizes an analog mismatch detector and a closed-loop mixed-signal matching state search circuit, without the need for an A/D converter. The integrated module is designed and fabricated on a 0.18 CMOS process. When tested on a band... View full abstract»

• ### A Novel On-Chip Active Dispersive Delay Line (DDL) for Analog Signal Processing

Publication Year: 2010, Page(s):584 - 586
Cited by:  Papers (4)
| | PDF (309 KB) | HTML

In this letter, we report the first on-chip design of an active dispersive delay line (DDL) based upon the distributed amplification structure. This distributed amplifier DDL exhibits nanosecond delay variation in the frequency band from 11 to 15 GHz. An on-chip temporal imager is implemented with this active DDL and a linear chirp generator, realized by ramping the control voltage of a voltage co... View full abstract»

Publication Year: 2010, Page(s):587 - 588
| PDF (1065 KB)
• ### 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.

Full Aims & Scope

## 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