Nkhani - Antena Yozungulira Yozungulira: Pamene Bandwidth Ndi Yofunika Kwambiri

Funsani mainjiniya aliyense wa ma antenna za momwe ma wideband amagwirira ntchito, ndipo mwina ma antenna ozungulira ozungulira adzawonekera msanga mukamakambirana. Mapangidwe ozungulira awa, opapatiza komanso ozungulira—okhala ndi manja opindika ngati chala chala kapena mlalang'amba—akhala akuthetsa mavuto a bandwidth kuyambira m'ma 1950. Ndipo akadalipobe mpaka pano.

Kodi Antenna Yozungulira Yozungulira Ndi Chiyani?

Pazosavuta, aantenna yozungulira yozunguliraIli ndi manja awiri kapena kuposerapo achitsulo olembedwa pa gawo lopyapyala la dielectric, lozungulira kuchokera pakati pa malo odyetsera. Mapangidwe awiri amalamulira: Archimedean spiral, komwe manja amafalikira pa liwiro losasintha, ndi logarithmic spiral, komwe curve imakula mofulumira. Onsewa amakwaniritsa cholinga chomwecho—bandwidth yotakata kwambiri—koma kudzera mu geometry yosiyana pang'ono.

Chinsinsi chili mu lingaliro lotchedwa "gawo logwira ntchito". Pafupipafupi inayake, dera lokhalo longa mphete la spiral—komwe circumference ikugwirizana ndi kutalika kwa mafunde—ndilo lomwe limatulutsa mphamvu. Sinthani pafupipafupi, ndipo dera logwira ntchito limangoyenda mkati kapena kunja m'manja. Antena sasamala kuti mumaponya pafupipafupi yanji; imangogwira ntchito.

N'chifukwa Chiyani Muyenera Kusankha Chozungulira Chozungulira?

1. Kugwira Ntchito kwa Ultra-Wideband

Iyi ndi nkhani yaikulu. Chozungulira chopangidwa bwino chingagwire ntchito pa ma frequency ratios a 10:1 kapena 20:1—kuyambira mazana angapo a MHz mpaka makumi a GHz—ndi feed imodzi. Pa makina omwe amafunika kuphimba ma band angapo popanda kusintha ma antenna, zimenezo ndi zosintha masewera.

2. ZozunguliraKugawanika kwa Chilengedwe

Ma antenna ozungulira amawonetsa polarization yozungulira mwachibadwa. Palibe ma polarizer akunja, palibe zovuta zina. Izi zimapangitsa kuti zikhale zoyenera mwachilengedwe pakulankhulana kwa satellite, GPS, ndi ntchito iliyonse yomwe ingakhale yosagwirizana ndi polarization kapena Faraday rotation.

3. Mbiri Yochepa komanso Yopepuka

Chifukwa chakuti amasindikizidwa pa zinthu zopyapyala, zozungulira zozungulira zimakhala zathyathyathya komanso zopepuka. Zitha kuyikidwa pamalo osalala, zofanana ndi zomangamanga zokhota, kapena kulumikizidwa mwachindunji m'makina omwe kukula kwake kumakhala kovuta.

4. Kachitidwe Kogwirizana Kudutsa Bandwidth

Mosiyana ndi ma antenna ena a broadband omwe amasintha mawonekedwe awo a beam malinga ndi kuchuluka kwa ma frequency, ma spirals amakhala ndi mawonekedwe okhazikika - nthawi zambiri ma beam a mbali ziwiri ali pafupi ndi ndege. Kudziwiratu kumeneku ndikofunikira mukamapanga malo ozungulira.

Kumene Mudzawapeza

•Nkhondo Yamagetsi ndi Kuyang'anira: Machitidwe omwe amafunika kuzindikira, kutseka, kapena kuletsa zizindikiro pamtundu waukulu wa spectrum amadalira mizere yozungulira. Ngati simukudziwa komwe chiwopsezocho chidzachokera—kapena kuchuluka kwa momwe chidzagwiritsire ntchito—mukufunika antenna yomwe siisamala.

•BroadbandKuwunikira ndi Kuyesa: Mu ma lab a EMC ndi malo owunikira ma spectrum, ma spirals amagwira ntchito ngati maumboni odalirika oyezera ma antenna ndi machitidwe m'magulu angapo okhala ndi kukhazikitsa kamodzi.

•Kulumikizana kwa Satellite ndi GPS: Kugawanika kozungulira komwe kumachitika komanso kuchuluka kwa ma bandwidth kumapangitsa kuti ma spirals akhale chisankho chabwino kwambiri pama terminals apansi ndi ma antenna oyenda mumlengalenga, makamaka pamene ma frequency band angapo amafunika kuphimbidwa.

•Radar Yolowera Pansi: Ma pulse afupi amatanthauza bandwidth yotakata. Mizere yozungulira imasamalira zizindikiro zonga impulse zomwe zimagwiritsidwa ntchito pojambula zithunzi za pansi pa nthaka popanda kulira kapena kusokoneza.

Lingaliro Lochokera ku Lab

Mnzake wina anati, "Ndi spiral, mukugulitsa phindu ndi bandwidth—ndipo nthawi zambiri, ndi malonda abwino." Anali wolondola. M'dziko lomwe zizindikiro sizikudziwika bwino ndipo magawidwe a ma frequency akusinthasintha, kukhala ndi antenna yomwe sisamala za ma frequency ndi chinthu chapamwamba chomwe chiyenera kulipidwa.

Antena za RFMiso Planar Spiral

Timapereka ma antenna ozungulira ozungulira omwe amaphimba ma frequency kuyambira pa UHF mpaka millimeter-wave, ndi zosankha za cavity backing ndi ma substrates apadera. Kaya mukumanga makina a EW kapena kukhazikitsa siteshoni yowunikira ma broadband, tili ndi kapangidwe koyenera.