Portable radio receiver with high antenna gain

摘要

In a portable radio receiver of the type wherein a metal member forming a loop antenna surrounds the circuit components making up the receiver circuitry, the receiver is provided with high impedance elements in series with at least the power supply and grounding lines at some point between the power supply and the RF-IF converter. The antenna circuitry may also include a high impedance element in series with the signal path at some point downstream of the RF-IF converter.