Design and Implementation of Cassegrain Antenna with 37dB Gain in Millimeter Wave Spectrum

Document Type : Original Article

Abstract

Millimeter wave  systems have a wide frequency band. Reflector antennas are a good choice for use in these sys-
tems, due to the broad frequency coverage, high efficiency and gain. In the present paper parabolic reflector antenna
characteristics  and  their  design  principles  have  been  provided.  For  this  purpose,  first  geometry  of  the  parabolic  re-
flector is inspected, and then design process of Cassegrain antenna and its feed have been discussed. Based on it, the
design of a Cassegrain antenna has been done with its feed. Due to the high sensitivity of Cassegrain reflector to the
placing  of  phase  center  of  the  feedhorn  antenna  at focusing  point  of  the  reflector,  it  has  been  tried to  obtain  equal
phase  centers  at  E  and  H-planes.  After  the  simulation  of  antenna by  CST  MWS, the  gain  of  the  antenna  is  obtained
37.27dB. In the current study a broadband Cassegrain system designed and implemented by using designed feed an-
tenna that operate well in 30-40GHz.

Keywords


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