Development of 38.5GHz Planar Cassegrain Antenna
碩士 === 國立交通大學 === 電信工程系 === 88 === In the thesis,a 38.5GHz planar cassegrain antenna is developed.the planar cassegrain antenna consist with fed antenna、polarizer and twisting polarization reflectarray. Using the polarizer to reflect the power from fed antenna and then the power will fall in twisti...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2000
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| Online Access: | http://ndltd.ncl.edu.tw/handle/87022496287603541239 |
| Summary: | 碩士 === 國立交通大學 === 電信工程系 === 88 === In the thesis,a 38.5GHz planar cassegrain antenna is developed.the planar cassegrain antenna consist with fed antenna、polarizer and twisting polarization reflectarray. Using the polarizer to reflect the power from fed antenna and then the power will fall in twisting polarization reflectarray. The reflectarray will change the polarization about 90 degree. Using the tunning stub to focus the every reflect element and then the power through the polarizer and low loss.
furture,may be we can achieve the beam scanning refer to Rotman lens structure or rotating by mechanical designed. This structure can popularly use in military or commercial communication.
final,the 38.5GHz planar cassegrain property: 3.4 degree beamwidth、22 dBi antenna gain 、main lob and side lob ratio is 15 dB and co-polarization and cross-polarization ratio is 10 dB.
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