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Guided wave structure for dual leaky-mode microstrip antenna design

This paper presents a guided wave structure for dual leaky mode antenna design. The proposed guided wave structure consists of two half-width microstrip lines using grounded via holes. Two different half-width microstrip lines support two leaky modes in this structure. Each half-width microstrip line supports a leaky mode. The operation frequency of these two leaky modes can be designed independently. Prototype antenna design for dual leaky mode operation is provided. The isolation of two leaky modes is better than 20 dB over both leaky modes operation bands in simulated and measured results.