A Nested Antenna Approach for a Quad-Band Dual Polarization Antenna Element

This paper demonstrates a quad-band antenna design that will provide four frequency bands of operation with positive realized gain across 4.0-40.0 GHz. Simulated positive realized gain is the criteria used to define the bandwidth of each individual band. For applications where impedance match and total antenna efficiency are paramount, this paper shows that a positive realized gain does not necessarily correspond to a good impedance match over all of these frequency bands.