1992•Institution of Engineering and Technology eBooksRequires access
Broadband antennas
R. A. Burberry
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Abstract
What constitutes a broadband antenna is subjective, which is why some antennas so described by their inventors may not be considered so by potential users. An essential feature is that certain characteristics - usually including radiation pattern coverage and VSWR- should remain within specified limits over a. frequency range usually at least an octave. The limits will vary according to the specification; thus an antenna whose VSWR is less than 5:1 over an octave might be a satisfactory broadband receiving antenna for electronic surveillance monitoring (ESM) but could be unsuitable for a transmitting role in an electronic countermeasures system (ECM). It should be noted that the main bandwidth limitation is likely to be radiation pattern coverage rather than VSWR.