Low noise amplifier design for Ka Band VSAT systems | IEEE Conference Publication | IEEE Xplore

Low noise amplifier design for Ka Band VSAT systems


Abstract:

Low noise amplifier design for receiver terminal of Ka Band VSAT systems is presented. The design achieves less than 0.95 dB noise figure at 19.7-20.2 GHz, receive band o...Show More

Abstract:

Low noise amplifier design for receiver terminal of Ka Band VSAT systems is presented. The design achieves less than 0.95 dB noise figure at 19.7-20.2 GHz, receive band of Ka band satellite communications systems. Typically, low noise block is used for this purpose, however, in this particular VSAT arrangement, reflector antenna is located away from the rotating antenna unit, which is intended for maritime applications. Two stage amplifier using NE3520 HJ-FET transistors and a bandpass filter is designed for 22 dB gain. The design has very low noise figure compared to its commercial counterparts.
Date of Conference: 09-11 May 2016
Date Added to IEEE Xplore: 16 June 2016
Electronic ISBN:978-1-5090-2214-4
Conference Location: Krakow, Poland

I. Introduction

Low noise amplifier (LNA) is an essential element for any satellite based communication or remote sensing system [1]. Especially for very small aperture terminals (VSAT's), LNA plays a critical role in achieving target gain-over-temperature (G/T) value and determines the overall reception quality at the RF front-end. LNA's are usually coupled with down conversion mixers to bring the RF signal down to L-band for satellite modems. Thus, low noise block (LNB) is common in many practical applications. However, in certain applications where the antenna element requires precision tracking, the weight of LNB and its blockage to satellite reception necessitates the use of LNB at a distance as opposed to immediate vicinity of the antenna phase center [2]. In such applications, the weak satellite signal must be amplified before it is being passed to remote LNB to overcome considerable cable loss which directly translates into higher noise figure (NF) and G/T.

Contact IEEE to Subscribe

References

References is not available for this document.