Small Broadband Antennas Using Lossy Matching Networks.
DEPARTMENT OF THE ARMY WASHINGTON DC
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A low-profile survivable antenna suitable for military use is described. Despite its small size, which might be one tenth of a wavelength, the antenna has reasonable transmission range for these applications. Very little operator attention is needed in operation, since a special matching circuit within the antenna network enables effective impedance matching, over a 31 frequency range, without necessity of switching to different matching circuits over different frequency bands. By including resistive components along with other passive inductive or capacitive elements, the reactance of the single matching circuit is made to effectively compensate the antennas impedance over the entire frequency range. The impedance of the circuit has a decreasing positive reactance which compensates for the decreasing negative reactance, with frequency, of the antenna. Author
- Electrical and Electronic Equipment