Method of producing an antenna

Details Method of producing an antenna Method of producing an antenna

2005-05-03

2005-05-03

Kim, Paul D (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S593000, C029S602100, C029S847000, C029S852000, C216S065000, C343S895000

Reexamination Certificate

active

06886237

ABSTRACT:
In a method of producing a quadrifilar antenna for circularly polarised radiation at frequencies above 200 MHz, the antenna is tuned by coupling it to a test source, measuring the relative phases and amplitudes of currents at predetermined positions in the individual elements of the antenna by means of probes capacitively coupled to the elements, and laser etching apertures in the elements to increase their inductance, the sizes of the apertures being computed according to the deviation of the measured relative phases from predetermined values.

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Kennedy, G. and Davis, B., “Electronic Communication Systems,” Fourth Edition; Macmillan/McGraw-Hill; Lake Forest, Illinois, pp. 188 and 200-201.

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