| 摘要 |
A horn for direct radiation or for use as a reflector feed is for operation at disparate frequencies. The horn has a conventionally LSE1,0 distribution at the lower of the two frequencies, and both LSE1,0 and LSE3,0 modes, phased for improved gain, at the higher frequency. The LSE3,0 mode is generated by an H-plane step, and the appropriate phasing, together with improved gain at the lower operating frequency, is achieved by the use of dielectric loading adjacent the E-plane walls of the phasing section of the horn. |
