RADIO COMMUNICATIONS DEVICE WITH ANTENNA SWITCH Russian patent published in 2000 - IPC

FIELD: radio communications. SUBSTANCE: device has matching circuit that ensures matching between radio circuit and antenna unit both in draw-out and draw-in positions by varying configuration due to action of switch responding to antenna position. Switch may be built integral with feeder lead; the latter and grounding lead can lock antenna in position and grounding lead can hold guide tube in position. As an alternative, switch may incorporate diode and sensor. Antenna unit rod may function as sensor which closes and opens electric circuit between feeder lead and grounding one by changing state of diode. EFFECT: improved appearance, increased reliability, facilitated manufacture due to reduced number of complex and moving parts. 9 cl, 11 dwg