Nhau - Antena Yekutenderera Yakatenderera: Kana Bandwidth Yacho Ichikosha Chaizvo

Bvunza chero mainjiniya weantenna nezve mashandiro ebhandi remagetsi, uye mikana ndeyekuti maantenna anotenderera anotenderera achaonekwa pakutanga kwehurukuro. Aya maumbirwo akatetepa, akatenderera—ane maoko anokombama semunwe kana giraxy—ave achigadzirisa matambudziko ebandwidth kubvira kuma1950. Uye achiripo nanhasi.

Chii chinonzi Planar Spiral Antenna?

Zviri nyore, akanyanga inotenderera yakatendereraine maoko maviri kana kupfuura esimbi akachekwa pachikamu che dielectric chakatetepa, achitenderera achienda kunze kubva panzvimbo yekudyisa iri pakati. Magadzirirwo maviri anotonga: Archimedean spiral, uko maoko anopararira nekukurumidza kusingachinji, uye logarithmic spiral, uko curve inokura zvakanyanya. Ose anozadzisa chinangwa chimwe chete—bandwidth yakafara zvikuru—asi kuburikidza nejometri yakasiyana zvishoma.

Chinokosha chiri muchinhu chinonzi pfungwa ye "nzvimbo inoshanda". Pa frequency yakatarwa, nzvimbo chaiyo yakaita serin'i ye spiral - uko denderedzwa rinoenderana ne wavelength - ndiyo inopenya. Chinja frequency, uye nzvimbo inoshanda inongofamba mukati kana kunze nemaoko. Antena haina basa kuti unokanda frequency ipi pairi; inoramba ichishanda.

Sei Uchifanira Kusarudza Planar Spiral?

1. Kushanda kweWideband Yakakura

Uyu ndiwo musoro wenyaya. Spiral yakagadzirwa zvakanaka inogona kushanda pamusoro pema frequency ratios e10:1 kana kunyange 20:1—kubva pamazana mashoma eMHz kusvika kumakumi eGHz—ne feed imwe chete. Kune masisitimu anoda kufukidza mabhendi akawanda pasina kuchinja ma antenna, izvozvo zvinochinja mutambo.

2. DenderedzwaKupatsanurana nezvisikwa

Ma antenna anotenderera anoburitsa polarization yakatenderera. Hapana ma polarizers ekunze, hapana kuoma kwakawanda. Izvi zvinoita kuti akwanise kutaurirana nesatellite, GPS, uye chero application iyo polarization isingaenderane kana Faraday rotation iri dambudziko.

3. Hunhu Hwakaderera uye Huremu Hwakareruka

Nekuti dzakadhindwa pamatanda matete, ma planar spirals akati sandara uye akareruka. Dzinogona kuiswa pamusoro, kuenderana nezvivakwa zvakakombama, kana kubatanidzwa zvakananga mumasisitimu ane dambudziko guru.

4. Maitiro Akafanana Pamwe Chete neBandwidth

Kusiyana nemamwe maantenna e-wideband anochinja chimiro chawo chemwenje zvichienderana nefrequency, ma spirals anoramba aine patani yakagadzikana—kazhinji madanda maviri ari kure nepane imwe plane. Kufanotaura uku kunokosha paunenge uchigadzira nzvimbo yekuvhara.

Kwauchavawana

•Hondo yeMagetsi neKutarisa: Masisitimu anoda kuona, kuvharira, kana kuvharira masaini muhukuru hwese anoshandisa ma "spirals". Kana usingazive kuti njodzi yacho ichabva kupi—kana kuti ichashandiswa kakawanda sei—unoda antenna isina hanya.

•BroadbandKuongorora uye Kuedza: MuEMC labs nenzvimbo dzekutarisa spectrum, ma spirals anoshanda semareferensi akavimbika ekuyera ma antenna nemasisitimu mumabhendi akawanda ane setup imwe chete.

•Kutaurirana kweSatellite neGPS: Kubatana kwedenderedzwa uye bandwidth yakafara zvinoita kuti ma spirals ave sarudzo yakanaka ye ground terminals ne spaceborne antennas, kunyanya kana ma frequency bands akawanda achida kufukidzwa.

•Radar Inopinda Pasi: Mapundu mapfupi anoreva bandwidth yakafara. MaSpirals anobata zviratidzo zvakaita seimpulse zvinoshandiswa mumifananidzo yepasi pevhu pasina kurira kana kukanganiswa.

Pfungwa kubva kuLab

Mumwe waanoshanda naye akamboti, "Ne spiral, uri kutengesa purofiti ne bandwidth—uye kazhinji, izvozvo zvinongoenderana nekutengeserana kwakanaka." Aive akarurama. Munyika umo masaini asingafungidzike uye kugoverwa kwema frequency kuri kuramba kuchichinja, kuva ne antenna isingatarisiri ma frequency chinhu chakanaka chakakodzera kubhadhara.

RFMiso Planar Spiral Antennas

Tinopa ma antenna anotenderera anotenderera anofukidza ma frequency akasiyana kubva ku UHF kusvika ku millimeter-wave, nesarudzo dze cavity backing uye custom substrates. Kunyangwe uri kuvaka EW system kana kugadzira broadband monitoring station, tine dhizaini inokwana.