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IEEE Microwave and Wireless Components Letters

Issue 1 • Jan. 2005

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Displaying Results 1 - 22 of 22
  • Table of contents

    Publication Year: 2005, Page(s): c1
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  • IEEE Microwave and Wireless Components Letters publication information

    Publication Year: 2005, Page(s): c2
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  • A 2.4-GHz distributed antenna switch for Bluetooth transceivers

    Publication Year: 2005, Page(s):1 - 3
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (325 KB) | HTML iconHTML

    This letter describes a distributed antenna switch suitable for short-range wireless transceiver integrated circuits with a better performance in terms of insertion loss and linearity than conventional single-pole double-throw switches. The principle has been verified on a Bluetooth front-end implemented in a 0.18μim bulk complementary metal-oxide-semiconductor technology with a supply vol... View full abstract»

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  • Dielectric rod waveguide antenna for W band with good input match

    Publication Year: 2005, Page(s):4 - 6
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (133 KB) | HTML iconHTML

    Antennas based on dielectric rod waveguide made of GaAs and fused sapphire cut along its optical axis inserted in the end of a standard WR-10 metal waveguide are investigated with computer simulations and experiments in the W band. The radiation pattern is found to be similar to that of the open metal waveguide end, but less frequency-dependent beamwidth and input match: measured return loss is mo... View full abstract»

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  • Ultra wideband monopole/dielectric resonator antenna

    Publication Year: 2005, Page(s):7 - 9
    Cited by:  Papers (97)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB) | HTML iconHTML

    A hybrid antenna is presented, consisting of an annular dielectric resonator antenna combined with a quarter-wave monopole to simultaneously act as a radiator and a loading element, producing an ultra wideband response. A prototype antenna is designed and a 3:1 bandwidth is demonstrated. View full abstract»

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  • A printed hemispherical helical antenna for GPS receivers

    Publication Year: 2005, Page(s):10 - 12
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (180 KB) | HTML iconHTML

    A self-matched printed hemispherical helical antenna for potential use in global positioning system receivers is introduced. Unlike wired hemispherical helical antennas, its printed form renders it a much more stable and endurable structure and also easier for fabrication. The optimized antenna shows an impedance bandwidth of 6%, a 3-dB axial ratio bandwidth of 6%-7%, a return loss greater than 20... View full abstract»

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  • Coupling behaviors of quarter-wavelength impedance transformers for wideband CPW bandpass filters

    Publication Year: 2005, Page(s):13 - 15
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (186 KB) | HTML iconHTML

    Quarter-wavelength coplanar waveguide (/spl lambda//4-CPW) impedance transformers with low and high characteristic impedance are characterized via fullwave method of moments short-open calibration (MoM-SOC) approach and further utilized as alternative K- and J-inverter networks with enhanced coupling. Network parameters are obtained and compared with those of two traditional lumped-CPW elements, d... View full abstract»

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  • Miniaturized ring coupler of arbitrary reduced size

    Publication Year: 2005, Page(s):16 - 18
    Cited by:  Papers (32)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (398 KB) | HTML iconHTML

    A simple and successful method for miniaturizing a ring coupler is proposed. The size of the ring coupler is reduced by connecting multiple open stubs on the inside of the ring. There is no need of any lumped element, via hole or wire bond, but only microstrip lines. The reduced size is arbitrary and the results of the miniaturized ring coupler coincide with that of the traditional one. View full abstract»

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  • K-band MMIC active band-pass filters

    Publication Year: 2005, Page(s):19 - 21
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (425 KB) | HTML iconHTML

    Two K-band active band-pass filters using 0.15-μm GaAs pHEMT technology, with one fixed-frequency and the other tunable, are designed, fabricated, and tested. The fixed-frequency filter has its central frequency at 22.6 GHz, with 900-MHz bandwidth (4%). The tunable filter can be tuned from 19.5 to 21.5 GHz with the same bandwidth. Both circuits have a common size of 1 mm × 1 mm. To... View full abstract»

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  • Miniaturized dual-mode bandpass filter using inductively loaded cross-slotted patch resonator

    Publication Year: 2005, Page(s):22 - 24
    Cited by:  Papers (30)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (139 KB) | HTML iconHTML

    An inductively loaded cross-slotted patch resonator is presented to build up a miniaturized dual-mode bandpass filter. By terminating the cross-slot on the square patch with the T-shape slot stubs, the resonant frequency is exhibited to be largely lowered due to an additional inductive loading, implying a capacity in size-miniaturization. In parallel, the rectangular slit is introduced at the four... View full abstract»

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  • A simple circular-to-rectangular waveguide transition

    Publication Year: 2005, Page(s):25 - 26
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB) | HTML iconHTML

    We describe a novel one-step TE/sub 11/-mode circular waveguide to TE/sub 10/-mode rectangular waveguide transition. The primary advantage of this device over existing transitions is its ease of fabrication. We have incorporated our transition into a number of waveguide components operating at V-band. The transition's measured return loss exceeds 15 dB over a 12% bandwidth centered near 60 GHz. View full abstract»

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  • A parallel-plate waveguide model of lossy microstrip lines

    Publication Year: 2005, Page(s):27 - 29
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (198 KB) | HTML iconHTML

    An improved semi-analytical model of a lossy microstrip transmission line is proposed. The model is based on the theory of the fundamental transverse magnetic mode of a lossy parallel-plate waveguide whose dielectric medium is assigned the effective permittivity of the respective lossless microstrip line. The complex propagation constant of the fundamental mode is computed by imposing the Leontovi... View full abstract»

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  • Spectral analysis of Serpinskij carpet-like prefractal waveguides and resonators

    Publication Year: 2005, Page(s):30 - 32
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (345 KB) | HTML iconHTML

    Exact results on some modal properties of waveguides and resonators is studied, whose geometry is derived from "Serpinskij carpet-like" prefractals (Serpinskij carpet and sponge; Menger sponge). The study is biased to the closed-form computation of specific resonances and eigenmodes (called "dia-periodic"), and to the relation existing between their topology and the existence of a finite set of tr... View full abstract»

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  • Theoretical analysis of low phase noise design of CMOS VCO

    Publication Year: 2005, Page(s):33 - 35
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (434 KB) | HTML iconHTML

    A theoretical analysis on low phase noise of voltage-controlled oscillators (VCOs) based on complementary cross-coupled LC VCO by 0.35-μm complementary metal oxide semiconductor technology is demonstrated. From the procedure of optimization steps, the excess noise factor of the amplifier coming from the active device has been determined. The proposed VCO operates at 2 GHz with phase noise ... View full abstract»

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  • An integrated low power highly linear 2.4-GHz CMOS receiver front-end based on current amplification and mixing

    Publication Year: 2005, Page(s):36 - 38
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (236 KB) | HTML iconHTML

    A low power 2.4-GHz complementary metal oxide semiconductor (CMOS) receiver front-end using highly linear mixer based on current amplification and mixing is reported. In the proposed mixer, linearity is greatly improved by using current mirror amplifier and transconductance linearization using multiple gated transistors. Single IF direct conversion receiver (DCR) architecture is used to achieve hi... View full abstract»

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  • A new phase noise reduction method of oscillator by loaded Q improvement using dual feedback topology

    Publication Year: 2005, Page(s):39 - 41
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (121 KB) | HTML iconHTML

    This letter presents a new method to reduce the phase noise in oscillator based on the loaded Q improvement approach. A hairpin resonator is weakly coupled to the two microstrip lines to improve the loaded Q of it and the dual feedback topology is used to enable the start-up oscillation condition to be satisfied. The high loaded Q property of the resonator in the proposed oscillator circuit is ana... View full abstract»

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  • Hybrid FDTD-MPIE method for the simulation of locally inhomogeneous multilayer LTCC structure

    Publication Year: 2005, Page(s):42 - 44
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (120 KB) | HTML iconHTML

    A new hybrid finite-difference time-domain (FDTD) and mixed potential integral equation (MPIE) method is proposed for the modeling of multilayer planar circuits with locally inhomogeneous objects. By using equivalence principle, the original problem can be decomposed into two kinds of regions. The FDTD method is employed to model the locally inhomogeneous objects and construct an interaction matri... View full abstract»

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  • IEEE Microwave Theory and Techniques Society Undergraduate/Pre-Graduate Scholarships

    Publication Year: 2005, Page(s): 45
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    Publication Year: 2005, Page(s): 46
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  • IEEE copyright form

    Publication Year: 2005, Page(s):47 - 48
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  • IEEE Microwave and Wireless Components Letters Information for authors

    Publication Year: 2005, Page(s): c3
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  • IEEE Microwave and Wireless Components Letters blank page

    Publication Year: 2005, Page(s): c4
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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