Size reduction and higher operating bands of CRLH antennas

A design of compact size and multi-band composite right-left handed meta-material antennas for wireless applications is presented. The proposed antenna consists of single left handed cell. The series interdigital capacitor and short circuit stub which acts as shunt inductor are considered the main block of the proposed antenna. The proposed antenna is designed to operate at different frequency bands. Because of the nonlinearity of the left handed region of the composite right left handed transmission line, the compactness of the antenna has been achieved. The proposed antenna has compact size (its size is only 28 × 22 mm²). The design represents size reduction of approximately 60 % compared to conventional patch antennas operating at the same frequencies. The antenna is designed, simulated and measured. A good agreement is achieved between the measured and simulated results.