NON-GROUNDED TYPE ULTRA HIGH FREQUENCY ANTENNA

摘要: PURPOSE:To attain automatic and contactless changeover attended with an insertion/withdrawal operation of antenna element, to avoid increase in the volumical space factor high reliability for a long time by setting required way static capacitance inductance 2nd metallic member whose electric length is specific value arranged parallel lst connecting coupler coupling inductive element value. CONSTITUTION:When 10 1/2 wavelength A operating frequency band or below extracted from container groove 53, 22 are contactless-coupled through electrostatic coupling. thin 20 one terminal connects 30 lambda/4 at prescribed interval provided gets impedance resonance between members 22,30 respect while stretched out. The matching feeder 60 simply obtained point position 22,30, nearly used as ground-wire, then installation base end not increased.