A Wideband Squintless Traveling-Wave Antenna

In this paper, a wideband squintless travelingwave antenna is proposed. By bending and meandering branches of different lengths, the main beam of the antenna can be designed in an arbitrary direction, including the endfire direction. The working principle is explained. Examples of antennas with different element numbers (1×N) are demonstrated for validation. The simulation results of the 1×16-element design show that the beam directions are within 29° ± 1° with respect to the broadside direction in a radiation band from 8.5 to 14.5 GHz (with a radiation bandwidth of 43.4%). In the radiation band, the reflection coefficient is lower than -10 dB and the peak gain is 11.7 dBi.dBi.