A low profile broadband wide scan phased array

The design of a low profile, broadband element, with wide scan property and suitable for use in small phased arrays, is presented. The radiator is a dual-probe, capacitive-fed patch with a parasitic element and backed by a metallic cavity. The cavity is filled with rohacell foam and the patches are...

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Bibliographic Details
Main Authors: Chan, K.K., Seah, H.W., Cheong, C.H., Oh, H.K., Peng, B.T.
Format: Conference Proceeding
Language:English
Subjects:
balun feed
Bandwidth
Feeds
Frequency
High-K gate dielectrics
Impedance matching
Laboratories
low profile
Modal analysis
patch array
Phased array
Phased arrays
Probes
Wideband
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Description
Summary:The design of a low profile, broadband element, with wide scan property and suitable for use in small phased arrays, is presented. The radiator is a dual-probe, capacitive-fed patch with a parasitic element and backed by a metallic cavity. The cavity is filled with rohacell foam and the patches are supported by layers of this foam. Such a radiator designed for a maximum scan of 45° in the E-plane is shown to have a frequency ratio greater than 2.35:1 or bandwidth > 81% and with an active scan VSWR of 2:1. The broadband property is obtained through capacitive feeding with two large stepped probes in a balanced configuration. Further, the element is compact, with a height at less than 0.27¿ C including the balun feed where ¿ C is the wavelength at mid-band.
ISSN:2165-4727
2165-4743
DOI:10.1109/APMC.2009.5385347