Novel Leaky-Wave Antenna using Finger-Connected Interdigital Capacitor-Based Composite Right/Left-Handed Transmission Line

A novel finger-connected interdigital capacitor-based composite right/left-handed transmission line and it's application in leaky-wave antenna is studied. Since the additive slots and patches, the novel composite right/left-handed transmission line unit-cell eliminates the undesired resonances which exist in the traditional composite right/left-handed transmission line unit-cell. Then a leaky-wave antenna which includes 16 unit-cells is designed. The S parameters and gain patterns are presented for the antenna. Measured results are consistent with the simulated ones. The proposed leaky-wave antenna shows some desirable merits, such as miniaturized size, wide bandwidth, low-cost fabrication and flexible radiation directions.