Radar

Ma nā ʻōnaehana radar, hoʻohana nui ʻia nā mea ʻike e hoʻololi i ka hōʻailona echo i loaʻa e ka radar mai ka lekiō alapine (RF) i hōʻailona baseband no ka hana hou ʻana e like me ke ana mamao a me ke ana wikiwiki. ʻO ka mea kikoʻī, ʻo nā hōʻailona RF kiʻekiʻe i hoʻokuʻu ʻia e ka radar e hoʻohauʻoli i nā nalu i hoʻopuehu ʻia ma ka pahu hopu, a ma hope o ka loaʻa ʻana o kēia mau hōʻailona hawewe echo, pono e hoʻokō ʻia ka hana demodulation hōʻailona ma o ka mea ʻike. Hoʻololi ka mea ʻike i nā loli i ka amplitude a me ke alapine o nā hōʻailona RF kiʻekiʻe i ka DC a i ʻole nā hōʻailona uila haʻahaʻa no ka hana hōʻailona ma hope.

ʻO ka mea ʻike he ʻāpana maoli ia o ka module hana i ke ala e loaʻa ai ka radar, ka mea nui me kahi mea hoʻonui hōʻailona, mixer, oscillator kūloko, kānana a me ka amplifier i haku ʻia me ka mea hoʻokipa leo. Ma waena o lākou, hiki ke hoʻohana ʻia ka oscillator kūloko ma ke ʻano he kumu hōʻailona kuhikuhi (Local Oscillator, LO) e hāʻawi i kahi hōʻailona no ka hui pū ʻana, a hoʻohana nui ʻia nā kānana a me nā amplifiers no ka kānana clutter nāwaliwali o nā kaapuni a me ka hoʻonui ʻana i ka hōʻailona IF. No laila, he kuleana koʻikoʻi ka mea ʻike i ka ʻōnaehana radar, a ʻo kāna hana a me ka paʻa o ka hana e pili pono i ka ʻike a me ka hiki ke nānā ʻana o ka ʻōnaehana radar.

Ka manawa hoʻouna: Iune-25-2023