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# IEEE Microwave and Wireless Components Letters

## Filter Results

Displaying Results 1 - 25 of 27

Publication Year: 2014, Page(s):C1 - C4
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• ### IEEE Microwave and Wireless Components Letters publication information

Publication Year: 2014, Page(s): C2
| PDF (155 KB)
• ### Editorial

Publication Year: 2014, Page(s): 1
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• ### New Microstrip Cascaded-Quadruplet Bandpass Filter Based on Connected Couplings and Short-Ended Parallel-Coupled Line

Publication Year: 2014, Page(s):2 - 4
Cited by:  Papers (6)
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A cascaded-quadruplet (CQ) bandpass filter (BPF) using quarter-wave resonators is proposed based on connected couplings and short-ended parallel-coupled line (SE-PCL). The two distinct coupling mechanisms are well-characterized and employed to implement the main couplings and out-of-phase cross coupling among the CQ filter topology. Analytic design formulas with great simplicity are developed. Spe... View full abstract»

• ### A Simple Printed Compensated Balun for Enhanced Ultra-Wideband Performances

Publication Year: 2014, Page(s):5 - 7
Cited by:  Papers (9)
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This letter presents a printed compensated balun of simple structure for enhanced ultra-wideband performances. The presented design stems from the generic compensated type of Marchand balun with an optimization on selected parameters for the bandwidth enhancement. A simple planar structure based on a 3-metal-layered PCB is proposed to realize the optimal design of the circuit scheme. The proposed ... View full abstract»

• ### A 3-D Miniaturized High Selectivity Bandpass Filter in LTCC Technology

Publication Year: 2014, Page(s):8 - 10
Cited by:  Papers (11)
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Transmission zeros are used to improve the roll-off factors of filters but as a consequence, the out-of-band rejection decreases. In this work, an LTCC filter design is presented which employs a series inductor (implemented as a via hole) to improve the out-of-band rejection by introducing a third transmission zero. The filter, designed for GPS band (1.57 GHz), has one of the smallest reported foo... View full abstract»

• ### Investigation of the Flip-Chip Package With BCB Underfill for W-Band Applications

Publication Year: 2014, Page(s):11 - 13
Cited by:  Papers (1)
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Flip-chip package has great potential for use in millimeter-wave applications. However, the coefficient of thermal expansion mismatch between the chip and the substrate usually generates thermal stresses that fracture the flip-chip structure. The use of underfills with low dielectric loss is essential to improve the mechanical strength and reliability of the flip-chip package. Benzocyclobutene (BC... View full abstract»

• ### Wideband Bandpass Filter Composed of Dual-Path Resonators Using Coupled-Line and Transmission Line With Inductive Elements

Publication Year: 2014, Page(s):14 - 16
Cited by:  Papers (8)
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A dual-path resonator for a wideband bandpass filter (bandpass filter) is proposed by using a coupled-line and a transmission line with inductive elements. It realizes a dual-mode resonance by an open-circuited interdigital coupled-line and a transmission zero near the lower cutoff frequency due to the effect of the dual-path. The wideband BPF composed of two resonators and two open-circuited stub... View full abstract»

• ### Compact Microstrip Filtering Power Dividers With Good In-Band Isolation Performance

Publication Year: 2014, Page(s):17 - 19
Cited by:  Papers (22)
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Compact and high isolation microstrip filtering power dividers (PDs) have been presented in this letter. In order to effectively reduce circuit area, the compact folded net-type resonator is selected to build up the resonator-based PDs with a filtering response. The highly symmetric structure of the divider provides not only a good in-band isolation performance, but also a low magnitude imbalance ... View full abstract»

• ### Distributed Transmission Line Negative Group Delay Circuit With Improved Signal Attenuation

Publication Year: 2014, Page(s):20 - 22
Cited by:  Papers (10)
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In this letter, a novel design and implementation of a distributed negative group delay circuit (NGDC) with reduced signal attenuation is demonstrated. By inserting an additional transmission line Z2 into the conventional NGDC, the proposed NGDC provides further design parameters in order to obtain the required differential-phase group delay (GD) time and help to reduce the signal attenuation. As ... View full abstract»

• ### Novel Compact UWB Bandpass Filters Design With Cross-Coupling Between $lambda / 4$ Short-Circuited Stubs

Publication Year: 2014, Page(s):23 - 25
Cited by:  Papers (13)
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Two novel, compact, and highly frequency selective ultra-wideband (UWB) bandpass filters (BPFs) based on an improved model are presented in this letter. The improved model contains four short-circuited stubs connected by transmission lines. A cross-coupling between the first and last short-circuited stubs is introduced to obtain new pairs of transmission zeros on both sides of the passband. The re... View full abstract»

• ### Design of Millimeter-Wave Bandpass Filter Using Electric Coupling of Substrate Integrated Waveguide (SIW)

Publication Year: 2014, Page(s):26 - 28
Cited by:  Papers (13)
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A millimeter-wave (mmW) bandpass filter (BPF) using substrate integrated waveguide (SIW) is proposed in this work. A BPF with three resonators is formed by etching slots on the top metal plane of the single SIW cavity. The filter is investigated with the theory of electric coupling mechanism. The design procedure and design curves of the coupling coefficient (K) and quality factor (Q) are given an... View full abstract»

• ### Ultrawide Bandwidth Chip-to-Chip Interconnects for III-V MMICs

Publication Year: 2014, Page(s):29 - 31
Cited by:  Papers (3)
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Ultrawide bandwidth coplanar waveguide interconnects between GaAs chips based on a novel fabrication process are demonstrated. Fabricated structures on 100 μm thick GaAs chips exhibited chip-to-chip insertion losses below 1 dB up to 110 GHz, and below 2.2 dB up to 220 GHz from on-wafer S-parameter measurements. A return loss larger than 10 dB from 100 MHz to 220 GHz was measured. The measur... View full abstract»

• ### A Linear Phase Filter in Quadruplet Topology With Frequency-Dependent Couplings

Publication Year: 2014, Page(s):32 - 34
Cited by:  Papers (4)
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This letter presents a design of a linear phase microwave bandpass filter. The filter is composed of four resonators arranged in the quadruplet topology. Making the cross and one direct coupling dispersive gives additional design flexibility. The first advantage of using frequency-dependent couplings is the possibility to chose an arbitrary location of a pair of complex transmission zeros (TZs) in... View full abstract»

• ### Miniaturized and Large-Division-Ratio Ring Coupler Using Novel Transmission-Line Elements

Publication Year: 2014, Page(s):35 - 37
Cited by:  Papers (3)
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In this letter, a novel transmission-line element that is able to exhibit a high-impedance passband is proposed and applied for coupler realization with a large power division ratio. The analysis of the transmission-line element was conducted by its equivalent circuit model and the closed-form equations for the pole and zero frequencies of the effective impedance were derived to help control the p... View full abstract»

• ### A Novel Dual-Band Bandpass Filter With Closely Spaced Passbands

Publication Year: 2014, Page(s):38 - 40
Cited by:  Papers (5)
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This letter proposes a double-slot-loaded resonator for exploration of a novel dual-band bandpass filter with two closely spaced passbands. A small ratio of dual-passband central frequencies is realized by positioning the double slot stubs in an offset way. The first-passband fractional bandwidth can be properly tuned by a distance between the two slots, while the second one is determined by attac... View full abstract»

• ### A Bi-Phase MEMS Resonator Modulator

Publication Year: 2014, Page(s):41 - 43
Cited by:  Papers (1)
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The high-electric field piezoelectric properties of a PZT-transduced, two-port, acoustic resonator are utilized to create a binary phase shift modulator. The modulator operates at frequencies below 100 MHz in a length extensional mode. Typical peak modulation voltage levels are 7 V. The design is configured as a subsystem with separate RF and data ports for use in low data rate, battery-powered ne... View full abstract»

• ### Design of Low Phase-Noise Oscillator Based on a Hairpin-Shaped Resonator Using Composite Right/Left-Handed Transmission Line

Publication Year: 2014, Page(s):44 - 46
Cited by:  Papers (3)
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In this letter, a low phase-noise microwave oscillator based on a hairpin-shaped resonator (HSR) using a composite right/left-handed transmission line (CRLH TL) is proposed. The proposed HSR consists of the conventional transmission line (CTL) and the CRLH TL. In order to obtain the high- Q factor, an electric field is concentrated on the CRLH TL, and then the CRLH TL provides a low loss due to a ... View full abstract»

• ### A 0.8/2.4 GHz Tunable Active Band Pass Filter in InP/Si BiCMOS Technology

Publication Year: 2014, Page(s):47 - 49
Cited by:  Papers (3)
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A tunable active band pass filter (BPF) has been designed in a chip-scale heterogeneous integration technology, which intimately integrates InP HBTs on a deep scaled CMOS technology. The BPF test chip consists of a programmable gain amplifier (PGA), a BPF core, and a buffer. The chip features a frequency tuning range from 0.8 to 2.4 GHz with 150 MHz pass band and four gain steps: 0, 6, 12, and 16 ... View full abstract»

• ### Miniaturized 3-bit Phase Shifter for 60 GHz Phased-Array in 65 nm CMOS Technology

Publication Year: 2014, Page(s):50 - 52
Cited by:  Papers (15)
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The letter presents a compact 3-bit 90 ° phase shifter for phased-array applications at the 60 GHz ISM band (IEEE 802.11ad standard). The designed phase shifter is based on reflective-type topology using the proposed reflective loads with binary-weighted digitally-controlled varactor arrays and the transformer-type directional coupler. The measured eight output states of the implemented pha... View full abstract»

• ### A Miniaturized Marchand Balun in CMOS With Improved Balance for Millimeter-Wave Applications

Publication Year: 2014, Page(s):53 - 55
Cited by:  Papers (5)
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The analysis and design of a millimeter-wave passive balun on silicon substrate with small size and good balance is presented. The reason for the imbalance of the balun is analyzed and a novel method using two grounded T bars beneath the coupled lines to tune the balance is proposed. The balun was fabricated in a 65 nm CMOS process, by using broadside coupled lines with small separation, the lengt... View full abstract»

• ### A 94 GHz, 1.4 dB Insertion Loss Single-Pole Double-Throw Switch Using Reverse-Saturated SiGe HBTs

Publication Year: 2014, Page(s):56 - 58
Cited by:  Papers (7)
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This work demonstrates two 94 GHz SPDT quarter-wave shunt switches using saturated SiGe HBTs. A new mode of operation, called reverse saturation, using the emitter at the RF output node of the switch, is utilized to take advantage of the higher emitter doping and improved isolation from the substrate. The switches were designed in a 180 nm SiGe BiCMOS technology featuring 90 nm SiGe HBTs (selectiv... View full abstract»

• ### Mode Reconfigurable Resonators Insensitive to Alignment for Magnetic Resonance Wireless Power Transmission

Publication Year: 2014, Page(s):59 - 61
Cited by:  Papers (5)
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In this letter, a mode reconfigurable resonator insensitive to its alignment is proposed. The resonator is capable of maintaining a wireless power transmission (WPT) efficiency without degradation of its performance caused by misalignments. After optimum mode selection, the average WPT efficiency of 66.71% (59.02 to 71.34%) in the azimuthal plane is measured at the transmitting distance of 20 cm. ... View full abstract»

• ### Analysis of Loaded Substrate Integrated Waveguides and Attenuators

Publication Year: 2014, Page(s):62 - 64
Cited by:  Papers (6)
| | PDF (487 KB) | HTML

This letter provides an approximate analysis of a slotted substrate integrated waveguide with periodic loading elements using the transverse resonance technique. The technique is used to design a travelling wave attenuator whereby pin diodes are capacitively coupled to the waveguide slot. By changing the bias, and therefore loading resistance, a very constant, variable attenuation is produced over... View full abstract»

• ### UHF Surface Dynamics Parameters Radar Design and Experiment

Publication Year: 2014, Page(s):65 - 67
Cited by:  Papers (2)
| | PDF (300 KB) | HTML

This letter proposes a new ultra high frequency (UHF) radar system called UHF surface dynamics parameters radar (USDPR). The hardware has been developed based on the surface currents radar (SCR) system for an all-digital receiver platform, which realizes direct radio frequency (RF) band-pass sampling and orthogonal demodulation of the amplified echo, as compared with traditional intermediate frequ... 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