A 60 GHz conical horn antenna with polarizer fed by quasi-Yagi antenna

A meander-line polarizer integrated with a quasi-Yagi antenna fed conical horn was designed and tested. Acceptable performance for many commercial applications in the desired millimeter wave frequency range 58 to 62 GHz has been achieved. This medium gain antenna comprises a microstrip to horn transition and a polarization conversion in a relatively simple and compact way. At the 60 GHz center frequency the gain into each linear polarization was 9 dB, the return loss 9 dB, and the axial ratio 0.24 dB. In the frequency range 58 to 62 GHz the gain was better than 6 dB into each linear polarization, and the return loss was better than 8 dB. Within the previous frequency range and within the elevation angle range /spl plusmn/30/spl deg/ of the principal planes the ratio of the two orthogonal components was better than 6 dB.