Abstract: | A compact dual-band uniplanar antenna for operation in the 2.4/5.2/5.8 GHz WLAN/HIPERLAN2 communication bands is presented. The dual-band antenna is obtained by modifying one of the lateral strips of a slot line, thereby producing two different current paths. The antenna occupies a very small area of 14.5times16.6 mm2 including the ground plane on a substrate having dielectric constant 4.4 and thickness 1.6 mm at 2.2 GHz. The antenna resonates with two bands from 2.2 to 2.52 GHz and from 5 to 10 GHz with good matching, good radiation characteristics and moderate gain |
URI: | http://dyuthi.cusat.ac.in/purl/2726 |
Files | Size |
---|---|
Dyuthi-P00363.pdf | (302.2Kb) |
Abstract: | A new electronically reconfigurable dual frequency microstrip patch antenna with highly simplified varactor tuning circuitry is presented. The proposed design allows relatively independent selection of the two operating frequencies. Tuning ranges of 7.1 and 4.1% are realised for the two resonant frequencies without the use of any matching circuits. |
URI: | http://dyuthi.cusat.ac.in/purl/2758 |
Files | Size |
---|---|
Dyuthi-P00377.pdf | (94.62Kb) |
Abstract: | Propagation of electromagnetic waves through a microstrip line with 2D electromagnetic baud gap (EBG) structures of different geometrical shapes in the ground plane is investigated in this paper. Using transmission-line theory, the design equations for EBG structures are calculated. The measured, numerical. and simulated results are in gone) agreement |
URI: | http://dyuthi.cusat.ac.in/purl/1422 |
Files | Size |
---|---|
Design and anal ... ent geometrical shapes.PDF | (923.1Kb) |
Abstract: | The design, erection and evalution procedures for it microwave anechuic chamber competed at Cochin University for antenna studies are presented the chamber has an average reflectivity level of - 32 dB on at X-band frequencies, and it i, comparable to international standards. |
URI: | http://dyuthi.cusat.ac.in/purl/1434 |
Files | Size |
---|---|
Design,developm ... rowave antenna studies.PDF | (1.493Mb) |
Abstract: | The design and performance of a stepped slot printed monopole antenna in the ultrawideband is presented in this article. Multiple resonances generated by the stepped slot geometry are matched in the ultrawideband using a modified microstrip feed. The impedance bandwidth (SWR < 2) of the antenna is from 3 to 11 GHz. Radiation patterns are stable and omnidirectional with appreciable gain throughout the band. Performance of the antenna is also analyzed in the time domain, which reveals good pulse handling capabilities. Compact geometry of the antenna allows easy commercial deployment. |
URI: | http://dyuthi.cusat.ac.in/purl/2711 |
Files | Size |
---|---|
Dyuthi-P00351.pdf | (388.8Kb) |
Abstract: | The design of a compact, single feed, dual frequency dual polarized and electronically reconfigurable microstrip antenna is presented in this paper. A square patch loaded with a hexagonal slot having extended slot arms constitutes the fundamental structure of the antenna. The tuning of the two resonant frequencies is realized by varying the effective electrical length of the slot arms by embedding varactor diodes across the slots. A high tuning range of 34.43% (1.037–1.394 GHz) and 9.27% (1.359–1.485 GHz) is achieved for the two operating frequencies respectively, when the bias voltage is varied from 0 to −30 V. The salient feature of this design is that it uses no matching networks even though the resonant frequencies are tuned in a wide range with good matching below −10 dB. The antenna has an added advantage of size reduction up to 80.11% and 65.69% for the two operating frequencies compared to conventional rectangular patches. |
URI: | http://dyuthi.cusat.ac.in/purl/2733 |
Files | Size |
---|---|
Dyuthi-P00367.pdf | (179.9Kb) |
Abstract: | A new design for a compact electronically reconffgurable singlefeed dual frequency dual-polarized operation of a square-microstrip antenna capable of achieving tunable frequency ratios in the range 1.1 to 1.37 is proposed and experimentally studied. Varactor diodes inlegruted with the arms of the hexagonal slot and embedded in the square patch are used to tune the operating frequencies by applying reverse-bias voltage. The design has the advantage of size reduction up to 73.21% and 49.86% for the two resonant frequencies, respectively, as compared to standard rectangular patches. The antenna offers good bandwidth of 5.74% and 5.36% for the two operating frequencies. A highly simplified tuning circuitry without any transmission lines adds to the compactness of the design |
URI: | http://dyuthi.cusat.ac.in/purl/1424 |
Files | Size |
---|---|
Development of ... ble microstrip antenna.PDF | (1.614Mb) |
Abstract: | Experimental studies on a compact dual frequency microstrip antenna are presented. This antenna configuration provides an area reduction of 40% compared to a standard rectangular antenna operating at the same frequency without much degradation of the gain. The antenna structure can be modified to achieve the desired ratio between the two resonant frequencies |
URI: | http://dyuthi.cusat.ac.in/purl/1375 |
Files | Size |
---|---|
Dual-band dual- ... act microstrip antenna.PDF | (907.1Kb) |
Abstract: | A new design of' a dual-frequency dual-polarized square microsh'ip antenna fed along the diagonal, embedded with a square slot having three extended stubs for frequency tuning, is introduced. The proposed antenna was fabricated using a standard photolithographic method and the antenna was tested using the HP 3510(:; Vector Network Analyser. The antenna is capable of generating dual resonant frequencies with mutually perpendicular polarizations and broad radiation pattern characteristics. Such dual-frequency designs find wide applications in personal mobile handsets combining GSM and CDS 1800 modes, and applications in which different frequencies are used for emission and reception such as personal satellite communications and cellular network systems. |
URI: | http://dyuthi.cusat.ac.in/purl/1397 |
Files | Size |
---|---|
Dual-frequency ... r communication system.PDF | (2.098Mb) |
URI: | http://dyuthi.cusat.ac.in/purl/1351 |
Files | Size |
---|---|
Dual frequency miniature microstrip antenna.PDF | (807.9Kb) |
Abstract: | A new design of a dual-band dual-polarized electromagnetically coupled slot loaded square patch antenna, covering the WLAN 5.2 GHz and 5.8 GHz bands, achieving bandwidth enhancement by using tapered slot structure, is presented here. The proposed antenna covers 5.09–5.47 GHz and 5.7–5.88 GHz bands. Details of the antenna design along with experimental and simulated results are presented and discussed. |
URI: | http://dyuthi.cusat.ac.in/purl/2720 |
Files | Size |
---|---|
Dyuthi-P00357.pdf | (629.0Kb) |
Abstract: | In this paper, a dual port, dual frequency, dual polarized, octagonal shaped Microstrip patch antenna, suitable for GPS applications is discussed experimentally and theoretically. The proposed antenna configuration is characterized by good impedance bandwidth, gain, isolation between two ports and broad radiation patterns |
Description: | Personal Wireless Communications, 2005. ICPWC 2005. 2005 IEEE International Conference on,PP 305-307 |
URI: | http://dyuthi.cusat.ac.in/purl/4336 |
Files | Size |
---|---|
Electromagnetic ... ctagonal Patch Antenna.pdf | (207.5Kb) |
Abstract: | A theoretical analysis of a symmetric T-shaped rnicrostripfed rectangular microstrip antenna using the finite-difference titnedoniain (FDTD) method is presented in this paper. The resonant frequency, return loss, impedance bandwidth, and radiation patterns are predicted and are in good agreement with the measured results |
URI: | http://dyuthi.cusat.ac.in/purl/1408 |
Files | Size |
---|---|
FDTD analysis o ... lar microstrip antenna.PDF | (850.6Kb) |
Abstract: | Electromagnetic scattering behaviour of a superstrate loaded metallo– dielectric structure based on Sierpinski carpet fractal geometry is reported. The results indicate that the frequency at which backscattering is minimum can be tuned by varying the thickness of the superstrate. A reduction in backscattered power of 44 dB is obtained simultaneously for both TE and TM polarisations of the incident field. |
URI: | http://dyuthi.cusat.ac.in/purl/675 |
Files | Size |
---|---|
Frequency tunab ... ering reduction Anupam.pdf | (205.4Kb) |
Abstract: | A novel technique for backscattering reduction for both TE and TM polarisation, employing a metallo-dielectric structure based on Sierpinski carpet fractal geometry, is reported. A reduction in backscattered power of --30 dB is obtained for normal incidence in the X-band for the structure using the third iterated stage of the fractal geometry |
URI: | http://dyuthi.cusat.ac.in/purl/1406 |
Files | Size |
---|---|
Low backscatter ... d on sierpinski carpet.PDF | (1.096Mb) |
Abstract: | This paper presents the outcome of the experimental studies performed on L-strip fed compact rectangular microstrip antenna. The effect of the feed parameters upon the characteristics of the antenna is studied in detail. The antenna offers an impedance bandwidth of nearly 20% and is suitable for broadband applications |
URI: | http://dyuthi.cusat.ac.in/purl/1412 |
Files | Size |
---|---|
L-strip excited ... lar microstrip antenna.PDF | (898.2Kb) |
Abstract: | An innovative phaseshifterless, wideband, micrustrip leaky-wave antenna with an electronically steerable dual-pencil-beam pattern in the H-plane is presented. The log-periodic geometry of the leaky slots of the antenna results in a wide bandwidth of 25.19%. The Jan beam can he steered up to 14° over the wide resonating band of the anteww. The beam is also steerable at a fixed frequency. by reactivelty loading the slots and a maximum steering angle of about 14° is ohserved. for different capacitor values with an improved bandwidth of 33 _i%. This concept is studied using passive components but it can be extended to varactors |
URI: | http://dyuthi.cusat.ac.in/purl/1418 |
Files | Size |
---|---|
A novel electro ... dic leaky-wave antenna.PDF | (931.7Kb) |
Abstract: | A dual port dual polarized octagonal microstrip patch antenna suitable for dual band applications is discussed theoretically and experimentally. The antenna exhibits good impedance bandwidth, gain and broad radiation patterns. Parameters predicted by the Conformal Finite Difference Time Domain algorithm show good agreement with the simulated results and experimental observations |
Description: | Proc. XXVIII URSI General Assembly |
URI: | http://dyuthi.cusat.ac.in/purl/4337 |
Files | Size |
---|---|
Octagonal Micro ... Dual Band Applications.pdf | (878.3Kb) |
Abstract: | A compact coplanar waveguide-fed (CPW) monopole antenna for ultra-wideband wireless communication is presented. The proposed antenna comprises of a CPW-fed beveled rectangular patch with a modified slotted ground. The overall size of the antenna is 30 mm 27 mm 1.6 mm. The lower edge of the band is attained by properly decoupling the resonant frequencies due to the extended ground plane and the beveled rectangular patch of the antenna. The upper edge of the radiating band is enhanced by beveling the ground plane corners near the feed point. Experimental results show that the designed antenna operates in the 2.7–12 GHz band, for S11 10 dB with a gain of 2.7–5 dBi. Both the frequency domain and time domain characteristics of the antenna are investigated using antenna transfer function. It is observed that the antenna exhibits identical radiation patterns and reasonable transient characteristics over the entire operating band |
Description: | International Journal of RF and Microwave Computer‐Aided Engineering,VOL 22,issue 5,pp 594-602 |
URI: | http://dyuthi.cusat.ac.in/purl/4331 |
Files | Size |
---|---|
Planar UWB Ante ... d Slotted Ground Plane.pdf | (963.2Kb) |
Abstract: | In this paper we have investigated the effect of cavity diameter and wall height on resonance and radiation characteristics of a circular microstrip patch antenna. Experiments were conducted using a fabricated prototype placed inside a cylindrical cavity. The results were compared and verified with simulated data obtained using an electromagnetic simulator. About 9.6 to 10.5 dBi peak gain was obtained from measured and simulated data |
URI: | http://dyuthi.cusat.ac.in/purl/1088 |
Files | Size |
---|---|
APSYM-08 (G).zip | (27.35Mb) |
Dyuthi Digital Repository Copyright © 2007-2011 Cochin University of Science and Technology. Items in Dyuthi are protected by copyright, with all rights reserved, unless otherwise indicated.