Low-Profile Dual-Polarized Composite Patch-Monopole Antenna With Broadband and Widebeam Characteristics

A Design of Dual-Polarized Composite Patch-Monopole Antenna With Reconfigurable Radiation Pattern

“…In Mode 4 with two switches ON, there are two vertical inducted currents (J v1 and J v2 ) appear on the monopoles that have the same amplitude and opposite phase. In this state, the design works as the composite patch-monopole antenna whose total radiated field (E total ) can be synthesized as follows [24]:…”

“…where E 2 is the complex amplitude and d is the spacing between two monopoles. By adjusting the ratio of E 1 /E 2 , the composite patch-monopole antenna achieves a very wide beam in the E-plane (φ = 0 • ) radiation pattern [24]. Since AF monopole = 0 with φ = 90 • , the monopoles do not affect the H-plane pattern of the antenna.…”

“…In Modes 1 and 5, the antenna works as a conventional patch which yields a resonance at 2.46 GHz and 10-dB return loss bandwidth of 2.42 − 2.50 GHz. When one or two monopoles are connected to the GND which generate extra-resonance for the antenna system, and consequently, broaden the impedance matching bandwidth [24]. In Modes The coupling coefficients among P d1 and P d2 ports are calculated using ( 6) and (7) and given in Fig.…”