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A wide band patch antenna fed by an L-probe can be designed for dual- and multi-band applications by cutting U-slots on the patch. The half wavelength long U-slot resonates and introduces a band-notch. Multiple band-notches could be introduced by cutting several U-slots on the patch. Simulation and measurement results are presented to illustrate this design. Stable broadside radiation patterns are...
Several single feed truncated corner circularly polarized microstrip antennas with different substrate thickness are studied. It is found that the axial ratio bandwidth could be enhanced considerably when a thicker substrate is used, provided that a U-slot and/or L-probe are used to tune the impedance matching. One of the configurations attains an axial ratio bandwidth (Lt3dB) of about 14% within...
A wide band patch antenna fed by an L-probe can be designed for dual- and multi-band application by cutting U-slots on the patch. Simulation and measurement results are presented to illustrate this design.
In this paper we study the hybrid-ring feeding network, which has the advantages of linear phase difference across a wide impedance bandwidth. It is of practical interest to investigate the performance of hybrid ring feeding network in sequential feed circularly polarized dielectric resonator antenna (CP DRA) sub-array. In this paper, the performance of CP DRA sub-arrays excited by hybrid-ring feeding...
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