Abstract
Aiming to the problems that excessive reduction of airborne telemetry antenna’s size will cause a sharp deterioration of the antenna’s bandwidth and gain, this paper proposed that using a high-impedance surface in the airborne telemetry antenna. As the size and bandwidth of the high-impedance surface is far from being able to meet the application requirements, this paper designed a new high-impedance surface which can be applied to the telemetry transmitter antenna, and reduced the profile size of the telemetry antenna and increased the gain of the antenna at the same time. In addition, based on the equivalent circuit model, we have resolved the contradictory situation of small size and wide band gap in the high-impedance surface design. The results show that the low profile, high gain and wide bandwidth of the telemetry antenna can be achieved by using the new high-impedance surface. The antenna structure and design ideas presented in this paper can significantly improve the performance of airborne telemetry antenna.
Highlights
IntroductionWith the increasing number of high-risk item in flight test, real-time remote monitoring is becoming more and more important [1]
Real-time data processing and monitoring are often used in flight test
The parameters and performance of the telemetry antenna can not be taken into account, we have introduced the high resistance surface structure in the airborne telemetry antenna
Summary
With the increasing number of high-risk item in flight test, real-time remote monitoring is becoming more and more important [1]. Conventional airborne telemetry antenna size will lead to over-reduction of other antenna performance of the rapid deterioration, in which the bandwidth and gain is evident, so compromise between the various parameters and. The parameters and performance of the telemetry antenna can not be taken into account, we have introduced the high resistance surface structure in the airborne telemetry antenna. The high impedance surface can exhibit high surface impedance in a certain frequency band, can cut off the surface wave propagation, at the same time for the incident plane electromagnetic wave has the same phase reflection characteristics, can replace the metal reflective surface as the antenna ground plate, thereby reducing the antenna profile [3]. Simulation results using ANSOFT HFSS show that the new structure can make the telemetry antenna have a smaller profile size and better integration of antenna and fuselage without loss of bandwidth, and high antenna gain
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