Iyo log-periodic antenna ndeye yakakura-bhendi antenna iyo inoshanda musimboti yakavakirwa pane resonance uye log-periodic chimiro.Ichi chinyorwa chichakuzivisa iwe kune log-periodic antennas kubva kune matatu maficha: iyo nhoroondo, kushanda musimboti uye zvakanakira log-periodic antennas.

Nhoroondo ye log-periodic antennas

Log-periodic antenna ndeye yakakura-bhendi antenna ine dhizaini yakavakirwa pane log-periodic chimiro.Nhoroondo ye log-periodic antennas inotangira kuma1950s.

Iyo log-periodic antenna yakatanga kugadzirwa muna 1957 nemainjiniya ekuAmerica Dwight Isbell naRaymond DuHamel.Ndichiri kuita tsvakiridzo kuBell Labs, vakagadzira antenna yebroadband inokwanisa kuvhara mabhendi akawanda.Ichi chimiro cheantenna chinoshandisa log-periodic geometry, iyo inopa yakafanana nemwaranzi maitiro pamusoro peiyo frequency renji.

Mumakumi emakore anotevera, log-periodic antennas akashandiswa zvakanyanya uye kudzidza.Iwo anoshandiswa munzvimbo dzakaita sewaya kutaurirana, terevhizheni neredhiyo kugamuchira, radar masisitimu, zviyero zveredhiyo, uye tsvakiridzo yesainzi.Iyo yakakura-bhendi maitiro eiyo log-periodic antennas inovagonesa kuvhara akawanda ma frequency mabhendi, kuderedza kudiwa kweiyo frequency switching uye antenna kutsiva, nekuvandudza sisitimu kuchinjika uye kushanda nesimba.

Nheyo yekushanda ye log-periodic antenna yakavakirwa pane yayo yakakosha chimiro.Iyo ine nhevedzano yealternating simbi mahwendefa, imwe neimwe ichiwedzera pakureba uye nzvimbo zvichienderana nenguva yelogarithmic.Ichi chimiro chinoita kuti antenna ibudise misiyano yechikamu pama frequency akasiyana, nekudaro ichiwana yakakura-bhendi radiation.

Sezvo tekinoroji ichifambira mberi, dhizaini uye nzira dzekugadzira dze log-periodic antenna dzakavandudza.Mazuva ano log-periodic antennas anoshandisa zvigadzirwa zvepamberi uye maitiro ekugadzira kuvandudza kushanda kweantenna uye kuvimbika.

Nheyo yekushanda kwayo inogona kutsanangurwa muchidimbu sezvinotevera

1. Resonance musimboti: Dhizaini yelog-periodic antenna yakavakirwa pane resonance musimboti.Pane imwe frequency, chimiro cheantenna chinoumba resonant loop, ichibvumira antenna kuti igamuchire nemazvo uye kupenya mafungu emagetsi.Nekunyatso dhizainisa kureba uye nzvimbo yemarata esimbi, log-periodic antennas anogona kushanda mune akawanda resonant frequency renji.

2. Phase musiyano: Iyo log-periodic reshiyo yehurefu hwesimbi chidimbu uye spacing yeiyo log-periodic antenna inoita kuti simbi yega yega ibudise mutsauko wechikamu pamafrequency akasiyana.Uyu mutsauko wechikamu unotungamira kune resonant maitiro eiyo antenna pane akasiyana mafrequency, nekudaro ichigonesa kushanda kwebhendi rakakura.Zvidimbu zvipfupi zvesimbi zvinoshanda pamwero wepamusoro, ukuwo zvidimbu zvesimbi zvirefu zvinoshanda pazasi.

3. Beam scanning: Chimiro cheiyo log-periodic antenna inoita kuti ive nemhando dzakasiyana dzemwaranzi pama frequency akasiyana.Sezvo frequency ichichinja, iyo radiation kutungamira uye danda upamhi hweantenna zvakare inoshanduka.Izvi zvinoreva kuti log-periodic antennas anogona kuongorora uye kugadzirisa matanda pamusoro peyakafara frequency bhendi.

Zvakanakira zve log-periodic antennas

1. Broadband maitiro: Log-periodic antenna ndeye yakakura-bhendi antenna inogona kuvhara akawanda frequency mabhendi.Yayo log-periodic chimiro inoita kuti antenna ive yakafanana nemwaranzi maitiro mukati mese frequency renji, ichibvisa kudiwa kwe frequency switching kana antenna kutsiva, kuvandudza kushanduka kwesystem uye kugona.

2. Kuwana kwepamusoro uye kugona kwemwaranzi: Log-periodic antennas anowanzova nepamusoro pekuwedzera uye nemwaranzi inoshanda.Chimiro chayo chinobvumira resonance mune akawanda frequency renji, ichipa yakasimba radiation uye kugona kwekugamuchira.

3. Directivity control: Log-periodic antennas anowanzo kutungamira, ndiko kuti, ane simba remwaranzi kana yekugamuchira mune dzimwe nzira.Izvi zvinoita kuti log-periodic antennas ikwane kune maapplication anoda chaiyo radiation yakananga, senge kutaurirana, radar, nezvimwe.

4. Nyoresa dhizaini yehurongwa: Sezvo log-periodic antennas inogona kuvhara yakafara frequency renji, dhizaini yehurongwa inogona kurerutswa uye nhamba yeantenna inogona kuderedzwa.Izvi zvinobatsira kuderedza mutengo wehurongwa, kuderedza kuoma uye kugadzirisa kuvimbika.

5. Anti-interference performance: Log-periodic antenna ine yakanaka anti-interference performance mune yakakura frequency band.Chimiro chayo chinoita kuti antenna iite zvirinani kusefa zvisingadiwe frequency masiginecha uye kugadzirisa iyo system kuramba kukanganiswa.

Muchidimbu, nekunyatso dhizainisa kureba uye nzvimbo yemarata esimbi, iyo log-periodic antenna inogona kushanda mune akawanda resonant frequency renji, ine yakakura-bhendi maitiro, yakakwira bhendi uye kugona kwemwaranzi, kutonga kwekutungamira, dhizaini yakareruka uye anti-kupindira. .kuita zvakanakira.Izvi zvinoita kuti logarithmic periodic antennas ishandiswe zvakanyanya muwireless kutaurirana, radar, tsvakiridzo yesainzi uye mamwe minda.