The unique structure shown above has been developed by CRS.
It has very desirable characteristics for wideband antenna
applications. The geometry of the antenna element and the
properties of the back material have been carefully engineered
to achieve maximum bandwidth and gain with reduced antenna
aperture. The conventional antenna suffers from the ground
effect of the mounting structures (aircraft or ship body).
The CRS antenna uses multiple matching layers, eliminating
the destructive image created by the mounting structures.
The antenna can be attached to any platform without degrading
the antenna performance.
CRS antenna requires only a ¼ wavelength of the
antenna length to cover the low-frequency limit of the
antenna bandwidth (normally, a half wavelength is required
for dipole type). Single-element achieves 1:40 bandwidth
and combination of multiple scaled elements enables one
to build any arbitrary bandwidth greater than 1:40. A
VSWR plot of a sample antenna is shown above. The antenna
maintains VSWR<2.5 over 60MHz to 2GHz range (plot only
shows up to 1.2GHz).
