A Novel Short Length Half-width Microstrip Leaky Wave Antenna with Suppressed Back Lobes

A novel short half-width microstrip leaky wave antenna (MLWA) with suppressed back lobes is introduced. The design contains an oblique shape termination and a linked square metal with a grounded via hole. The oblique shape termination changes the direction of the reflected wave, and a linked square metal with a grounded via hole guides the remainder power of the reflected wave to the ground plane. As a result, the large back lobe of the short half-width MLWA could be suppressed. The measured results show that the proposed design (length of only 1 k0) improves the back lobes by 9 dB at 4.7 GHz compared with the original half-width MLWA. VC 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 3024–3026, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24805