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Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on

Date 3-8 July 2011

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  • 2011 IEEE International Symposium on Antennas and Propagation - Proceedings [Front cover]

    Publication Year: 2011, Page(s): c1
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  • [Title page]

    Publication Year: 2011, Page(s): i
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  • Copyright (c)2011 by The Institute of Electrical and Electronics Engineers, Inc. All rights reserved. [Copyright notice]

    Publication Year: 2011, Page(s): ii
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  • [Blank page]

    Publication Year: 2011, Page(s): iii
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  • Steering committee

    Publication Year: 2011, Page(s): iv
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  • Technical program committee

    Publication Year: 2011, Page(s): v
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  • Technical reviewers

    Publication Year: 2011, Page(s):vi - vii
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  • Chair's welcome

    Publication Year: 2011, Page(s): viii
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  • Table of contents

    Publication Year: 2011, Page(s):xv - lxxxii
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  • Analysis of the doubled-slot end-wall waveguide to CPW transition

    Publication Year: 2011, Page(s):1 - 4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (455 KB) | HTML iconHTML

    In this paper, a new type of double-slot end-wall waveguide-to-CPW transition is analyzed. The configuration is modified from a previously designed waveguide-to-microstrip splitter transition. A transmission line model is presented to explain the performance. The simulation results of 90 to 140 GHz transition including the E-field distribution confirm the analysis. View full abstract»

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  • Microstrip diplexer design for X-band RF/microwave front-end applications

    Publication Year: 2011, Page(s):5 - 7
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (241 KB) | HTML iconHTML

    This paper presents a microstrip diplexer operating at 9.79 and 11.47 GHz. The proposed diplexer consists of two parallel coupled line band-pass filters (BPFs) designed using a randomly defined image impedance technique. Thus, suitable coupled line gap distance can be obtained for conventional wet-etching fabrication. This allows easy design and fabrication of the parallel coupled line type BPFs a... View full abstract»

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  • A simple circuit model for planar waveguide power splitters used for millimeter-wave beam forming network

    Publication Year: 2011, Page(s):8 - 11
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (247 KB) | HTML iconHTML

    A generic, simple, and fast method using transmission line (T.L.) circuit model that can be used to design and characterize the substrate integrated waveguide (SIW) power splitters, is presented. The T.L. model is based on replacing all the components forming the actual SIW-power splitter structure by their multi-port networks. Two examples, 6 dB and 9 dB SIW-power splitter, are introduced to vali... View full abstract»

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  • Design of a RF NEMS switch matrix

    Publication Year: 2011, Page(s):12 - 15
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (822 KB) | HTML iconHTML

    This paper presents for the first time, the development of a monolithic RF NEMS switch matrix. A prototype 3×3 monolithic switch matrix is designed and simulated at the nano-scale level using Ansoft HFSS and Agilent ADS. Simulation results show that the proposed NEMS switch matrices are capable of working up to 60GHz with good RF performance such as return loss of at least 20dB, isolation o... View full abstract»

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  • Designs for broad-band cavity-coupled microstrip directional couplers

    Publication Year: 2011, Page(s):16 - 18
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (261 KB) | HTML iconHTML

    Cavity-coupled designs for microstrip directional couplers are presented in this paper. Different coupling coefficients are pursued. All the designs feature a cavity in an electrically thick ground plane, which serves as a common ground for two back-to-back microstrip lines. These cavity-coupled designs can offer more bandwidth compared to their corresponding slot-coupled designs. Finite element m... View full abstract»

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  • Broad-band microstrip power dividers using a cavity coupler

    Publication Year: 2011, Page(s):19 - 21
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (273 KB) | HTML iconHTML

    This paper presents two designs for microstrip power dividers using a cavity coupler. Both designs feature a cavity in an electrically thick ground plane between two parallel back-to-back microstrip lines with the input line terminated by an open-circuited stub. The cavity-coupled designs can provide more bandwidth compared to their corresponding slot-coupled designs. Finite element method is chos... View full abstract»

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  • Substrate integrated waveguide cross-coupled filters for witeless applications

    Publication Year: 2011, Page(s):22 - 24
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (222 KB) | HTML iconHTML

    This paper presents a pseudo-elliptic substrate integrated cross-coupled filter with two finite transmission zeros based on quasi-ridged resonators. The filter was designed and simulated at central frequency of about 5.8 GHz. It has a bandwidth of 400 MHz and exhibits good stopband rejection of 25 dB. View full abstract»

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  • A tri-band Wilkinson power divider utilizing coupled lines

    Publication Year: 2011, Page(s):25 - 28
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (369 KB) | HTML iconHTML

    A tri-band Wilkinson power divider is presented in this paper. The quarter-wavelength transformer in a conventional Wilkinson power divider is substituted by a pair of two-section transmission line and a coupled line in between. The design procedure for tri-band operation can be obtained by even-and odd- modes analysis. A tri-band Wilkinson power divider was designed and implemented on an FR4 prin... View full abstract»

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  • Design of miniaturized 3-way Bagley polygon power divider using non-uniform transmission lines

    Publication Year: 2011, Page(s):29 - 32
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (324 KB) | HTML iconHTML

    In this paper, a design of miniaturized 3-way Bagley polygon power divider (BPD) is presented. The design is based on using non-uniform transmission lines (NTLs) in each arm of the divider instead of the conventional uniform ones. For verification purposes, a 3-way BPD is designed, simulated, fabricated, and measured. Besides suppressing the fundamental frequency's odd harmonics, a size reduction ... View full abstract»

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  • Fano resonance in 3-D compound spirals: Chiral quality, extraordinary transmission and polarization gap

    Publication Year: 2011, Page(s):33 - 36
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (498 KB) | HTML iconHTML

    A unique recipe of achieving compound spiral photonic crystals (CSPCs) in three dimensions by holography is proposed, which is composed of unit cells with double right-handed (RH) spirals of π phase shift. Interferences between side beams in the umbrella-type configurations are employed to generate CSPCs. Chirality is pronounced, and paradoxical high RH transmission peaks appear exactly in ... View full abstract»

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  • Q and Mu

    Publication Year: 2011, Page(s):37 - 38
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (704 KB) | HTML iconHTML

    Wheeler in 1947 developed fundamental limitations for antennas within a hypothetical cylinder using electrostatics and magnetostatics. Chu in 1948 derived fundamental limitations for antennas within a hypothetical sphere using exact electrodynamics. He used an iterative ladder network representing the antenna. After 58 years Thal in 2006 included energy inside the sphere, again using an iterative ... View full abstract»

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  • Mutual coupling and correlation as performance metrics in evaluating multi-antenna systems

    Publication Year: 2011, Page(s):39 - 42
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB) | HTML iconHTML

    We investigate the effectiveness of designing a multi-antenna system based on reducing the amount of mutual coupling between the antennas and the envelope correlation for spatial multiplexing systems. The investigation is carried out at 1880 MHz for a 2×2 multi-antenna system of vertically polarized dipole antennas. The effectiveness of the coupling and the correlation performance metrics w... View full abstract»

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  • LTE MIMO throughput measurement method for characterization of multi-antenna terminal performance

    Publication Year: 2011, Page(s):43 - 46
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (564 KB) | HTML iconHTML

    This paper presents experiences and results from LTE MIMO throughput measurements of a USB dongle in a reverberation test system. The measurements are performed with the dongle itself and also when it is connected to external diversity antennas with high and low correlation. Three different maximum bit rates are used, 59, 70 and 81 Mbps. The results illustrate that it is possible to separate a goo... View full abstract»

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  • Antenna selection criterion suitable for indoor LOS scenarios for two-stream MIMO systems

    Publication Year: 2011, Page(s):47 - 50
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB) | HTML iconHTML

    In multiple input multiple output (MIMO) systems, antenna selection is an effective method to lead to improvements of the communication performances without increasing number of antenna elements. In this paper, we reveal the antenna selection criterion suitable for indoor LOS scenarios for two-stream MIMO systems. The indoor line-of-sight (LOS) scenarios are constructed by using ray-tracing propag... View full abstract»

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  • Degree-of-freedom evaluation of six-port antenna arrays in a rich scattering environment

    Publication Year: 2011, Page(s):51 - 54
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (483 KB) | HTML iconHTML

    It has been proposed that six co-located antennas, namely three electric and three magnetic dipoles, can offer up to a six-fold capacity increase in wireless channels, relative to that of single antennas. In other words, six degrees of freedom (DOFs) can be supported by co-located six-port transmit and receive antenna arrays. However, due to the complexity in designing and measuring such a six-por... View full abstract»

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  • Performance examinations of Multi-User MIMO systems with a compact antenna cube

    Publication Year: 2011, Page(s):55 - 58
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (309 KB) | HTML iconHTML

    Performance of Multi-User Multi-Input Multi-Output (MU-MIMO) systems with a 15-port compact antenna cube is measured and studied in typical scenarios proposed in this paper. The cube provides 15 individual channels and is ideal for Multiuser MIMO communications, especially when transmit antenna selection technology is adapted. Experimental measurements were carried out to evaluate the performance ... View full abstract»

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