T. J. Apren

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This paper describes the importance, general principle and main factors that must be considered in the design of a system both onboard as well as the ground segment, for a Space Solar Power system. Also explained are the design and realization of a functional demonstration model of the system (microwave to DC), especially the detector circuit that is part(More)
This paper describes the design and implementation of digital Costas loop for carrier recovery and demodulation of the data with Bit synchronizer for clock recovery in Field Programmable Gate Array (FPGA) for Binary Phase Shift Keying (BPSK) demodulation. For coherent demodulation, synchronization system is essential to extract carrier frequency and phase(More)
Filters play a critical role in RF and Microwave systems and the type used depends on the application. It is used in the receiver front end to improve selectivity and in transmitter for spurious /harmonic rejection where low insertion loss and narrow bandwidth are the major requirements. This paper, deals with the design of a narrow band cavity filter in L(More)
The frequency modulated continuous wave (FMCW) radar principle has been used in altimeter to measure altitude above the surface of the Earth. Traditionally it has been used in short range application due to its unambiguous range. The enhanced range resolution is a factor for FMCW radars compared with other types of radars. There are theoretical restrictions(More)
Conventional radar altimeter systems such as Pulsed or Frequency modulated continuous wave (FM CW) have limitations on measurable range and security. In this paper, we propose a Direct sequence spread spectrum (DSSS) based radar altimeter that offers good resolution and low probability of intercept. We carried out MATLAB simulations of the system and(More)
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