A Planar End-fire Array in S-band for Airborne Applications

Abstract

This paper presents the design of a source injection parallel coupled (SIPC) quadrature voltage-controlled oscillator (QVCO), realized with pMOS transistors, relaxing the sensitivity to substrate-induced noise and flicker noise, 1 f effect. A stacked planar spiral inductor exhibiting a Q factor of 5.8, with a pMOS-based varactor of 32% tuning range is implemented in 0.18 mm CMOS technology. The phase noise of the SIPC QVCO architecture simulated at 1 MHz of offset frequency is observed to be -111.43 dBc/Hz, in comparison with the phase noise of a conventional QVCO architecture which is observed to be -106.15 dBc/Hz, while dissipating the same amount of power about 14.6 mW. The effect of coupling factor, K to the amplitude and phase noise degradation is also investigated and verified.

An Investigation on End-Fire Radiation From Linearly Polarized Microstrip Antenna for Airborne Systems

“…Specially in airborne electronic system, there is a restriction on the antenna orientation as it should not obstruct the airflow during flight. Hence, end-fire antenna is suitable for being used in these applications [10]. This paper focuses on the design of an end-fire unit element microstrip antenna for Traffic Collision Avoidance System (TCAS) of civil aircraft.…”

Design and Development of a Multi-Feed End-Fired Microstrip Antenna for Tcas Airborne System

“…Specially in airborne electronic system like TCAS, there is a restriction on the antenna orientation as it should not obstruct the airflow during flight. Hence, end-fire antenna is suitable for being used in these applications [4]. The radiation characteristics of the end-fire antenna depend on the antenna structure through which the surface wave propagates and its magnitude.…”