| 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 |
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| Design and anal ... ent geometrical shapes.PDF | (923.1Kb) |
| 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 |
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| Development of ... ble microstrip antenna.PDF | (1.614Mb) |
| Abstract: | A new method for enhancing the 2.1 VSWR impedance bandwidth of microstrip antennas is presented. Bandwidth enhancement is achieved by loading the microstrip antenna by a ceramic microwave dielectric resonator (DR). The validity of this technique has been established using rectangular and circular radiating geometries. This method improves the bandwidth of a rectangular microstrip antenna to more than 10% (= 5 times that of a conventional rectangular microstrip antenna) with an enhanced gain of I dB |
| URI: | http://dyuthi.cusat.ac.in/purl/1367 |
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| Dielecting-reso ... ndwidth and efficiency.PDF | (1.297Mb) |
| 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 |
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| 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 |
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| Dual-frequency ... r communication system.PDF | (2.098Mb) |
| Abstract: | Experimental and simulated results for a dual-port dual-polarized microstrip antenna are presented. The antenna excites two orthogonally polarized resonant frequencies providing an isolation of -30 dB between the ports. The patch geometry consists of two circular arcs of different radii with their centers displaced by a distance. This new design offers an area reduction of -70% coinpared to it standard rectangular microstrip antenna with a reduction in gain of 1.7 dB |
| URI: | http://dyuthi.cusat.ac.in/purl/1391 |
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| Dual-band dual- ... act microstrip antenna.PDF | (907.1Kb) |
| 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 |
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| 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 |
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| 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 |
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| 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 |
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| L-strip excited ... lar microstrip antenna.PDF | (898.2Kb) |
| Abstract: | A circular miqrostrip antenna with a modified structure is presented. By adjusting the feed location along the circumference of the patch it is possible to match the antenna with a C microstrip line of any impedance. The impedance bandwidth and radiation characteristics are unaffected by this structural V modification. |
| URI: | http://dyuthi.cusat.ac.in/purl/674 |
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| Modified circular patch antenna Dey.pdf | (199.5Kb) |
| Abstract: | A simple technique to improve the impedance bandwidth of a circular microstrip patch antenna using two sectorial slots is proposed. Using this design more than 5% impedance bandwidth is obtained. The added advantage of this new antenna is that it can be fed by a 50- microstrip line |
| URI: | http://dyuthi.cusat.ac.in/purl/1366 |
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| A new broadband circular patch antenna.PDF | (1.429Mb) |
| Abstract: | A simple technique to improve the impedance bandwidth of a circular microstrip patch antenna using two sectorial slots is proposed. Using this design more than 5% impedance bandwidth is obtained. The added advantage of this new antenna is that it can be fed by a 50microstrip line |
| URI: | http://dyuthi.cusat.ac.in/jspui/handle/dyuthi/1559 |
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| A new broadband circular patch antenna.PDF | (1.429Mb) |
| Abstract: | A simple technique to improve the impedance bandwidth of a circular microstrip patch antenna using two sectorial slots is proposed. Using this design more than 5% impedance bandwidth is obtained. The added advantage of this new antenna is that it can be fed by a 50 microstrip line. |
| URI: | http://dyuthi.cusat.ac.in/jspui/handle/dyuthi/1558 |
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| A new broadband circular patch antenna.PDF | (1.429Mb) |
| Abstract: | A simple technique to improve the impedance bandwidth of a circular microstrip patch antenna using two sectorial slots is proposed. Using this design more than 5% impedance bandwidth is obtained. The added advantage of this new antenna is that it can be fed by a 50 microstrip line |
| URI: | http://dyuthi.cusat.ac.in/jspui/handle/dyuthi/1560 |
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| A new broadband circular patch antenna.PDF | (1.429Mb) |
| Abstract: | A new modFed circularpatch antenna resonating at much lower frequency compared to ordinary circular patch antenna having the same radius is presented in this paper. me antenna also exhibits wide variation in input impedance along the circumference of and hence can be matched with microstrip feedline of any line impedance. |
| URI: | http://dyuthi.cusat.ac.in/purl/676 |
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| A new compact circular patch antenna.pdf | (123.3Kb) |
| Abstract: | A new compact dual-band, dual-polarized microstrip antenna is presented. 7'iris antenna resonates at two frequencies with different polarizations: a linearly polarized one for terrestrial communication, and a circularly polarized one for satellite mobile communication. This antenna also provides an area reduction of 70% compared to a standard rectangular patch antenna |
| URI: | http://dyuthi.cusat.ac.in/purl/1376 |
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| A new compact d ... zed microstrip antenna.PDF | (1.044Mb) |
| Abstract: | A new microstrip antenna geometry with considerable reduction in size, with similar radiation characteristics to those of an equivalent rectangular patch antenna is proposed. A relationship has been suggested for fmding out the resonant frequency of the new geometry, and its validity has been established by the experimental results. Without increasing the aperture area, this geometry also offers a facility for considerably reducing the resonant frequency compared to conventional patches. |
| URI: | http://dyuthi.cusat.ac.in/purl/673 |
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| New compact microstrip antenna Jacob.pdf | (248.7Kb) |
| Abstract: | compact multihand planar octagonal-shaped microstrip antenna simultaneously suitable for mobile communication and blue tooth application is presented. The antenna provides sufficient isolation benveen the two operating bands and an area reduction of -29 % with respect to a circular patch operating in the same band |
| URI: | http://dyuthi.cusat.ac.in/purl/1384 |
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| A NEW MICROSTRI ... BLUETOOTH APPLICATIONS.PDF | (1.532Mb) |
| Abstract: | Simultaneous elimination of specular reflection and backscattered power from a plane metallic surface by simulated corrugated surfaces of constant period and variable strip width for TM polarisation is reported. This new configuration offers almost a ten-fold frequency bandwidth compared with a regularly spaced strip grating of the same size. |
| URI: | http://dyuthi.cusat.ac.in/purl/672 |
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| New simulated c ... characteristics Saji@.pdf | (262.5Kb) |
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