Sat, 26 Jul 2008 06:13:09 BST CiteULike: dcastro's dual http://www.citeulike.org/user/dcastro/tag/dual CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/3041397 <i>Antennas and Propagation Society International Symposium, 1988. AP-S. Digest (1988), pp. 936-939 vol.3.</i><br /><br />The authors discuss the design of a wideband, dual-proportion, <e1>C</e1>-band patch radiator with a 20% bandwidth for input voltage-standing-wave ratio <2. The aperture-coupled patch antenna, is selected as the starting point of the design. The authors focus on two of the advantages of aperture-coupled patch antennas: the aperture-coupling feed scheme eliminates the soldering process required to secure a pin connecting the feed circuit to the patch, as is necessary in fabricating the conventional probe-fed patch antenna; this can greatly reduce the complexity in constructing large patch arrays consisting of hundreds or thousands of elements; and the ground plane sandwiched between the feed circuitry and the radiating patch can prevent the radiation from the feed network from interfering with the patch radiation pattern. A description is given of the approaches used to achieve the bandwidth and the polarization requirements Aperture-coupled patch antennas with wide-bandwidth and dual-polarization capabilities CH Tsao YM Hwang F Kilburg F Dietrich doi:10.1109/APS.1988.94241 Antennas and Propagation Society International Symposium, 1988. AP-S. Digest (1988), pp. 936-939 vol.3. 2008-07-24T23:35:18-00:00 1988 Antennas and Propagation Society International Symposium, 1988. AP-S. Digest 936 939 vol.3 antenna broadband dual patch polarisation http://www.citeulike.org/user/dcastro/article/3025727 <i>Electronics Letters, Vol. 35, No. 13. (1999), pp. 1034-1036.</i><br /><br />A novel compact, conformal, dual-band, dual-polarisation antenna is presented. This antenna is capable of generating two distinct frequencies with different polarisation and radiation pattern characteristics: a monopolar mode for terrestrial cellular communication and a circularly polarised, upward oriented pattern for satellite mobile communication. Bandwidths of 2 and 4%, respectively, have been obtained in the two modes Compact dual-band dual-polarisation microstrip patch antenna E Lee PS Hall P Gardner doi:10.1049/el:19990730 Electronics Letters, Vol. 35, No. 13. (1999), pp. 1034-1036. 2008-07-21T21:51:15-00:00 1999 Electronics Letters 35 13 1034 1036 antenna compact dual dual-band microstrip patch polarisation http://www.citeulike.org/user/dcastro/article/2915276 <i>Microwaves, Antennas and Propagation, IEE Proceedings H, Vol. 137, No. 6. (1990), pp. 331-336.</i><br /><br />The impedance properties of a dual concentric annular ring microstrip patch antenna are described. This patch operates at two frequency bands which may be closely spaced. The TM/sub 12/ mode is primarily investigated but other modes are also treated. An equivalent circuit model for the input impedance is presented together with experimental verification. Surface waves are found to be important even for very thin substrates and these are included in the model. Factors which influence the ring design are discussed.<<ETX>> Input impedance of concentric ring microstrip antennas for dual frequency band operation including surface wave coupling NS Nurie RJ Langley Microwaves, Antennas and Propagation, IEE Proceedings H, Vol. 137, No. 6. (1990), pp. 331-336. 2008-06-22T15:31:52-00:00 1990 Microwaves, Antennas and Propagation, IEE Proceedings H 137 6 331 336 antenna dual frequency impedance input patch ring http://www.citeulike.org/user/dcastro/article/2802243 <i>Communications, IEEE Transactions on, Vol. 47, No. 1. (1999), pp. 33-43.</i><br /><br />Using a simple finite integral representation for the bivariate Rayleigh (1889) cumulative distribution function previously discovered by the authors, we present expressions for the outage probability and average error probability performances of a dual selective diversity system with correlated slow Rayleigh fading either in closed form (in particular for binary differential phase-shift keying) or in terms of a single integral with finite limits and an integrand composed of elementary (exponential and trigonometric) functions. Because of their simple form, these expressions readily allow numerical evaluation for cases of practical interest. The results are also extended to the case of slow Nakagami-m fading using an alternate representation of the generalized Marcum (1950) Q-function A unified performance analysis of digital communication with dual selective combining diversity over correlated Rayleigh and Nakagami-m fading channels MK Simon MS Alouini doi:10.1109/26.747811 Communications, IEEE Transactions on, Vol. 47, No. 1. (1999), pp. 33-43. 2008-05-15T17:57:08-00:00 1999 Communications, IEEE Transactions on 47 1 33 43 analysis channel communication digital diversity dual fading rayleigh http://www.citeulike.org/user/dcastro/article/2782028 <i>Microwave and Wireless Components Letters, IEEE, Vol. 14, No. 3. (2004), pp. 124-126.</i><br /><br />Periodic etched pattern on the ground plane underneath the ring resonator are incorporated to realize a miniaturized ring filter with stronger rejection of higher harmonic passbands. Two square microstrip ring filters, with and without periodic etched pattern on the ground plane, were designed with a bandwidth of 135 MHz centered at 2.4 GHz and 3 GHz respectively. A rejection of at least 25 dB of the second harmonic passband has been achieved for the filter with periodic etched pattern. EBG-based dual mode resonator filter YW Kong ST Chew doi:10.1109/LMWC.2003.822570 Microwave and Wireless Components Letters, IEEE, Vol. 14, No. 3. (2004), pp. 124-126. 2008-05-09T23:50:40-00:00 2004 Microwave and Wireless Components Letters, IEEE 14 3 124 126 dual filter mode resonator http://www.citeulike.org/user/dcastro/article/2782025 <i>Electronics Letters, Vol. 37, No. 20. (2001), pp. 1213-1214.</i><br /><br />A dual-polarised microstrip antenna capable of achieving a wide bandwidth, a high isolation, low cross-polarisation levels and low backward radiation levels is presented. The H-shaped coupling aperture is used. For wide bandwidth and easy integration with active circuits, it uses the aperture-coupled stacked microstrip square patches. Measured return loss exhibits a bandwidth of over 20.9%, and isolation is better than 36 dB over the bandwidth. Cross-polarisation levels and the front-to-back ratio are better than 22 and 21 dB, respectively Wideband dual-polarised microstrip patch antenna SC Gao LW Li P Gardner PS Hall doi:10.1049/el:20010828 Electronics Letters, Vol. 37, No. 20. (2001), pp. 1213-1214. 2008-05-09T23:50:34-00:00 2001 Electronics Letters 37 20 1213 1214 antenna dual microstrip patch polarisation wideband http://www.citeulike.org/user/dcastro/article/2782022 <i>Electronics Letters, Vol. 37, No. 18. (2001), pp. 1106-1107.</i><br /><br />A dual-polarised aperture-coupled microstrip antenna with a wide bandwidth, a high isolation, low cross-polarisation levels and low backward radiation levels is presented. The square patch is fed at two corners via H-shaped apertures. The measured return loss exhibits a bandwidth of over 24.4% and the isolation is better than 30 dB over the bandwidth. The cross-polarisation levels and the front-to-back ratio are better than -23 and 22 dB, respectively Dual-polarised wideband microstrip antenna SC Gao LW Li P Gardner PS Hall doi:10.1049/el:20010760 Electronics Letters, Vol. 37, No. 18. (2001), pp. 1106-1107. 2008-05-09T23:49:22-00:00 2001 Electronics Letters 37 18 1106 1107 antenna dual microstrip polarisation wideband http://www.citeulike.org/user/dcastro/article/2776269 <i>Microwave and Wireless Components Letters, IEEE, Vol. 15, No. 3. (2005), pp. 162-164.</i><br /><br />The paper presents a new design of dual-mode dielectric-loaded rectangular cavity filters. The response of the filter is mainly controlled by the location and orientation of the coupling apertures with no intra-cavity coupling. Each dual-mode dielectric-loaded cavity generates and controls one transmission zero which can be placed on either side of the passband. Example filters which demonstrate the soundness of the design technique are presented. New dual-mode dielectric resonator filters S Amari M Bekheit doi:10.1109/LMWC.2005.844210 Microwave and Wireless Components Letters, IEEE, Vol. 15, No. 3. (2005), pp. 162-164. 2008-05-09T16:40:10-00:00 2005 Microwave and Wireless Components Letters, IEEE 15 3 162 164 dual mode resonator http://www.citeulike.org/user/dcastro/article/2774608 <i>Microwaves, Antennas and Propagation, IEE Proceedings -, Vol. 151, No. 5. (2004), pp. 430-434.</i><br /><br />A novel design of a dual-mode resonator with a double-ring structure for band-pass filter applications is presented in this paper. Conventionally, dual-mode ring resonators are used to obtain band-pass filters. Based on voltage/current couplings, a dual-mode double-ring resonator was recently constructed to improve the responses of the conventional dual-mode ring resonator. In order to obtain a low insertion loss, a wide band and higher rejection, three filters using a dual-mode double-ring resonator are designed for 2.4 GHz ISM band applications. Dual-mode double-ring resonators for microstrip band-pass-filter applications JC Liu PC Lu CH Shie CS Cheng L Yao doi:10.1049/ip-map:20040725 Microwaves, Antennas and Propagation, IEE Proceedings -, Vol. 151, No. 5. (2004), pp. 430-434. 2008-05-09T07:26:03-00:00 2004 Microwaves, Antennas and Propagation, IEE Proceedings - 151 5 430 434 bandpass dual filter microstrip mode resonator ring http://www.citeulike.org/user/dcastro/article/2768643 <i>Antennas and Propagation International Symposium, 2007 IEEE (2007), pp. 2061-2064.</i> Diplexed dual-polarization proximity coupled patch antenna Luis Inclan-Sanchez Jose-Luis Vazquez-Roy Eva Rajo-Iglesias doi:10.1109/APS.2007.4395930 Antennas and Propagation International Symposium, 2007 IEEE (2007), pp. 2061-2064. 2008-05-08T06:35:59-00:00 2007 Antennas and Propagation International Symposium, 2007 IEEE 2061 2064 antenna diplexed dual patch polarisation http://www.citeulike.org/user/dcastro/article/2768632 <i>Microwave and Wireless Components Letters, IEEE, Vol. 14, No. 1. (2004), pp. 4-6.</i><br /><br />This letter presents a high isolation dual-frequency orthogonally polarized rectangular patch antenna utilizing microstrip feed line integrated with a defected ground structure (DGS). The demonstrated approach results in a significant improvement in port isolation in comparison to a conventional dual-polarized antenna fed by simple microstrip lines. Measurements show an improvement of 20 dB in port isolation relative to the conventional antenna, operating at 2 and 2.5 GHz. Image impedance of a microstrip line with DGS is controlled by the DGS geometry without modifying the dimension of the line. A 150 /spl Omega/ high impedance line is effectively implemented using a microstrip line with 75 /spl Omega/ line width by incorporating the DGS. High isolation dual-polarized patch antenna using integrated defected ground structure Younkyu Chung Seong-Sik Jeon D Ahn Jae-Ick Choi T Itoh doi:10.1109/LMWC.2003.821501 Microwave and Wireless Components Letters, IEEE, Vol. 14, No. 1. (2004), pp. 4-6. 2008-05-08T06:28:54-00:00 2004 Microwave and Wireless Components Letters, IEEE 14 1 4 6 antenna dual patch polarisation http://www.citeulike.org/user/dcastro/article/2762266 <i>Microwave Symposium Digest, 1994., IEEE MTT-S International (1994), pp. 1749-1752 vol.3.</i><br /><br />A novel circular patch rectifying antenna (rectenna) has been developed which converts microwave energy into DC power at 2.45 GHz. Dual polarization is achieved by two orthogonal microstrip feed lines. Rectification is achieved by GaAs Schottky-barrier diodes located on each feed line. A 48% conversion efficiency from microwave power to DC power was achieved. The design was based on a nonlinear circuit analysis A dual polarized circular patch rectifying antenna at 2.45 GHz for microwave power conversion and detection JO Mcspadden K Chang doi:10.1109/MWSYM.1994.335103 Microwave Symposium Digest, 1994., IEEE MTT-S International (1994), pp. 1749-1752 vol.3. 2008-05-06T18:38:43-00:00 1994 Microwave Symposium Digest, 1994., IEEE MTT-S International 1749 1752 vol.3 antenna circular dual patch polarisation http://www.citeulike.org/user/dcastro/article/2601150 <i>Solid-State Circuits, IEEE Journal of, Vol. 42, No. 6. (2007), pp. 1291-1299.</i><br /><br /><para> The signals received by two antennas can be processed by a single time-shared receiver but only in the absence of interferers and channel-select filters. A low-IF receiver architecture is introduced that translates two antenna signals to positive and negative frequencies in the complex domain, reducing the number of baseband A/D converters by a factor of two. A dual-receiver prototype designed and fabricated in 0.18-<formula formulatype="inline"><tex>$mu$</tex></formula>m CMOS technology provides a sensitivity of <formula formulatype="inline"><tex>$-72$</tex> </formula> dBm with an EVM of <formula formulatype="inline"><tex>$-25$</tex> </formula> dB for 64 QAM signals while drawing 60.2 mW from a 1.8-V supply. </para> A Receiver Architecture for Dual-Antenna Systems H Rafati B Razavi doi:10.1109/JSSC.2007.897150 Solid-State Circuits, IEEE Journal of, Vol. 42, No. 6. (2007), pp. 1291-1299. 2008-03-27T08:23:01-00:00 2007 Solid-State Circuits, IEEE Journal of 42 6 1291 1299 antenna architecture dual receiver system http://www.citeulike.org/user/dcastro/article/2431184 <i>Electronics Letters, Vol. 35, No. 6. (1999), pp. 437-438.</i><br /><br />A novel thin stacked shorted patch antenna for the 1800 MHz frequency band is presented. The antenna is dual-resonant and small in size. It has a very low profile and a bandwidth of almost 10%, which is sufficient, for example, for GSM1800 or GSM1900 systems. The radiation pattern of the antenna is suitable for directive cellular handset antenna applications Thin dual-resonant stacked shorted patch antenna for mobile communications J Ollikainen M Fischer P Vainikainen doi:10.1049/el:19990324 Electronics Letters, Vol. 35, No. 6. (1999), pp. 437-438. 2008-02-26T19:52:54-00:00 1999 Electronics Letters 35 6 437 438 antenna communication dual mobile patch shorted http://www.citeulike.org/user/dcastro/article/2426180 <i>Antennas and Propagation, IEEE Transactions on, Vol. 46, No. 4. (1998), pp. 596-598.</i><br /><br />Planar inverted F antennas (PIFA) have been proposed as possible candidates for mobile telephone handsets. We describe the design of a compact PIFA suitable for operation at 900 MHz. In addition, we provide modifications to this design that allow it to operate in dual-frequency bands at 300 and 1800 MHz. Finite-difference time-domain (FDTD) and experimental results are provided A compact PIFA suitable for dual-frequency 900/1800-MHz operation CR Rowell RD Murch doi:10.1109/8.664127 Antennas and Propagation, IEEE Transactions on, Vol. 46, No. 4. (1998), pp. 596-598. 2008-02-25T18:07:12-00:00 1998 Antennas and Propagation, IEEE Transactions on 46 4 596 598 antenna dual frequency gsm pifa http://www.citeulike.org/user/dcastro/article/2348223 <i>Antennas and Propagation, IEEE Transactions on, Vol. 51, No. 8. (2003), pp. 1936-1940.</i><br /><br />A novel compact design for achieving dual-band dual-polarized radiation suitable for applications in the 900/1800-MHz cellular systems is presented. The proposed antenna consists of a rectangular ring patch (for the 900-MHz operation) and a notched rectangular patch (for the 1800-MHz operation), which are printed on the same layer, and each patch is aperture-coupled by two H-shaped coupling slots to generate two orthogonal linearly polarized waves. By further incorporating a properly designed feed network, the proposed antenna shows good port decoupling of less than -39 dB and -34 dB for dual linear polarizations in the 900- and 1800-MHz bands, respectively. Details of the antenna design and experimental results are presented. A compact dual-band dual-polarized patch antenna for 900/1800-MHz cellular systems Tzung-Wern Chiou Kin-Lu Wong doi:10.1109/TAP.2003.814728 Antennas and Propagation, IEEE Transactions on, Vol. 51, No. 8. (2003), pp. 1936-1940. 2008-02-07T07:53:48-00:00 2003 Antennas and Propagation, IEEE Transactions on 51 8 1936 1940 antenna compact dual dual-band gsm mobile patch polarisation http://www.citeulike.org/user/dcastro/article/2187852 <i>Antennas and Propagation, IEEE Transactions on, Vol. 50, No. 3. (2002), pp. 399-401.</i><br /><br />This paper presents a new design of a broad-band dual-polarized single microstrip patch antenna with highly decoupled input ports and low cross-polarization (XP) radiation. A prototype of the proposed antenna with center frequency at 1800 MHz is presented. Both the dual linear polarizations have 10-dB return-loss impedance bandwidths greater than 14% and high decoupling between the two input ports (S₂₁ less than -40 dB across the entire bandwidths) is obtained. Moreover, the XP radiation in the principal planes of the dual linear polarizations is seen to be less than -20 dB Broad-band dual-polarized single microstrip patch antenna with high isolation and low cross polarization Tzung-Wern Chiou Kin-Lu Wong doi:10.1109/8.999635 Antennas and Propagation, IEEE Transactions on, Vol. 50, No. 3. (2002), pp. 399-401. 2008-01-02T11:49:42-00:00 2002 Antennas and Propagation, IEEE Transactions on 50 3 399 401 antenna broadband dual microstrip patch polarisation