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Two-stage low-noise-amplifier (LNA) using single stub matching networks for S-band operation is proposed, designed, and developed. The configuration aims to obtain high gain amplifier with minimum voltage standing wave ratio (VSWR). The proposed LNA consists of the first and the second stages using hetero junction FET NE3509M04 as active device where it has high associated gain. The proposed LNA is...
Synthetic Aperture Radar (SAR) is radar technology for remote sensing which transmits electromagnetic pulse to earth where the pulse is reflected back to SAR and received by antenna receiver. The received signal is very low, it should be amplified by Low Noise Amplifier (LNA). To satisfy the SAR system, this paper propose to design a double stage LNA which operate at 1.27 GHz. In the design process,...
This paper studies the design of low noise amplifier (LNA) by using combining non simultaneous conjugate match and simultaneous conjugate match technique. The purpose of such combining technique is to obtain trade off minimum noise figure, minimum voltage standing wave ratio (VSWR) and high gain. In the design process, two stage configurations are applied. The first stage uses non simultaneous conjugate...
This paper studies the design of two stage microwave low noise amplifier (LNA) for coastal radar application at S-band operation. The cascade amplifier configuration and double stub matching networks are applied in this design which is aimed to obtain high gain with minimum reflected RF power. The first stage uses E-pHEMT GaAs FET of ATF-551M4 type and the second one uses RF transistor of BFP740FESD...
Blast has become a major problem in the upland rice of Indonesia, as the improved resistant varieties with high yield performances released in the 90's became susceptible only a few years after their release. The present study investigated the efficiency of association of susceptible and resistant varieties in reducing leaf and neck blast and increasing yield. Two sets of experiments were conducted...
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