Abstract

Hussein H. Ghouz
New Two_Port Microstrip Patch Antenna Structures
in this paper, a new compact microstrip antenna structure having two physically separated ports (180o orientation) has been proposed, designed &#97 &#110 &#100 presented. Each antenna port resonates at a different single frequency (or dual frequencies) within the 4G band (broadband and/or wideband), &#97 &#110 &#100 it has high port-to-port isolation (below -22.0 dB). The antenna design is mainly based upon a novel reconfigurable ground structure (shape, dimensions &#97 &#110 &#100 location). The full ground of microstrip antenna has been partitioned into three isolated ground strips, each one having a specific width &#97 &#110 &#100 length. The orientation of these strips is perpendicular to the feeders, &#97 &#110 &#100 each strip has two (or more) slots of different geometries. Such ground configuration is referred to as Defective Digital Ground Structures (DDGS). The proposed microstrip antenna has been simulated using the CST_MW studio, &#97 &#110 &#100 it has been mounted on a cheaper FR4-substrate to verify the proposed design. Simulation results showed that for each antenna port, resonance frequencies, operating bands &#97 &#110 &#100 isolation can be adjusted using the proposed DDGS to achieve the desired antenna specifications. Thus, DDGS is simply representing built-in resonance &#97 &#110 &#100 decoupling circuits with no additional cost for antenna design. The presented study offers a new practical &#97 &#110 &#100 simple approach to solve the multiport antenna design problem.