Now showing items 21-28 of 28
| 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: | 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) |
| Abstract: | Design, development and experimental observations of a L: band printed dipole antenna is presented.Bandwidth enhancement is achieved by end-loading or the dipole arms. Using the present technique Impedance bandwidth van be enhanced up to 50% without degrading the efficiency of the antenna. |
| URI: | http://dyuthi.cusat.ac.in/purl/1435 |
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| Novel wide band printed dipole antenna.PDF | (1.287Mb) |
| Abstract: | A forward - biased point contact germanium signal diode placed inside a waveguide section along the E -vector is found to introduce significant phase shift of microwave signals . The usefulness of the arrangement as a phase modulator for microwave carriers is demonstrated. While there is a less significant amplitude modulation accompanying phase modulation , the insertion losses are found to be negligible. The observations can be explained on the basis of the capacitance variation of the barrier layer with forward current in the diode |
| URI: | http://dyuthi.cusat.ac.in/purl/1432 |
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| Phase modulatio ... ermanium signal diodes.PDF | (882.1Kb) |
| Abstract: | A dual-port microstrip antenna with a crescent shaped patch with excellent isolation betwecn the ports has been reportcd [I]. Since circular-sided geometries are inore compact than rectangular oncs, thcy find morc applications in microstrip arrays. The crcscent shaped antenna geometry [ I ] provides greater area rcductioii compared to other circular sided patches for broadband operation [2]. In this Lctter, formulac for calculating thc TM, I and TMZI mode resonant frequencies of this microstrip antenna, obtained by modifying the equations of a standard circular patch [3] are presentcd. Thcorctical results are compared with experimental observations aid the validity of the computation is established. |
| URI: | http://dyuthi.cusat.ac.in/purl/670 |
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| Resonant freque ... icrostrip antenna Sona.pdf | (217.3Kb) |
| Abstract: | Design and development of a new feed -horn antenna with low sidelobe levels is reported . The E-walls of this antenna are fabricated with low -loss dielectric substrate , periodically loaded with thin conducting strips . The antenna is found to be simulating the radiation characteristics of metallic corrugated horns . This can be an ideal substitute for metallic corrugated horns with added advantages like light -weight and low production cost. |
| URI: | http://dyuthi.cusat.ac.in/jspui/handle/dyuthi/1562 |
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| A Strip-Loaded Feed-Horn Antenna.PDF | (988.8Kb) |
| Abstract: | Design and development of a new feed -horn antenna with low sidelobe levels is reported . The E-walls of this antenna are fabricated with low -loss dielectric substrate , periodically loaded with thin conducting strips . The antenna is found to be simulating the radiation characteristics of metallic corrugated horns . This can be an ideal substitute for metallic corrugated horns with added advantages like light -weight and low production cost. |
| URI: | http://dyuthi.cusat.ac.in/jspui/handle/dyuthi/1563 |
| Files | Size |
|---|---|
| A Strip-Loaded Feed-Horn Antenna.PDF | (988.8Kb) |
| Abstract: | A trapezoidal strip grating surface that eliminates specular reflections almost over the entire X -band frequency range for TM polarization is reported This new grating structure overcomes the bandwidth limitation of conventional rectangular strip grating surfaces |
| URI: | http://dyuthi.cusat.ac.in/purl/1348 |
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| Wideband trapez ... of specular reflection.PDF | (808.9Kb) |
Now showing items 21-28 of 28
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