The principle and design of a novel microstrip directional coupler are presented.The error performance of the microwave phase discriminator (MPD) based on the directional coupler is also investigated.是什么意思_The principle and design of a novel microstrip directional coupler are presented.The error performance of the microwave phase discriminator (MPD) based on the directional coupler is also investigated.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句