当多数常规机载雷达依靠机械扫描天线收发信号的时候，有源电子扫描阵列(AESA)传感器却使用固定的孔径。

While most conventional airborne radars rely on some form of mechanically scanned antenna to transmit and receive signals, active electronically scanned array (AESA) sensors employ a fixed aperture.

youdao

逆合成孔径雷达(ISAR)重点论述用固定雷达对活动目标成像，例如对飞机成像或对船成像等。

Inverse Synthetic Aperture Radars (ISAR) is mainly to describe fixed radar imaging moving targets such as airplane and ship.

youdao

考察了树脂功能基含量、比表面和孔径对固定化酶活的影响。

Effects of amount of DEAE, surface area and pore diameter on the activity of immobilized aminoacylase were investigated.

youdao