2. Kushandiswa kweMTM-TL muAntenna Systems
Ichi chikamu chinotarisa kune artificial metamaterial TLs uye mamwe ezvakajairika uye akakodzera maapplication ekuona akasiyana antenna zvimiro zvine mutengo wakaderera, nyore kugadzira, miniaturization, yakafara bandwidth, kukwirisa uye kugona, yakafara dhizaini kugona uye yakaderera chimiro. Dzinokurukurwa pasi apa.
1. Broadband uye multi-frequency antennas
Mune yakajairwa TL ine hurefu hwe l, kana angular frequency ω0 yapihwa, kureba kwemagetsi (kana chikamu) chetambo yekutapurirana inogona kuverengerwa sezvizvi:
Iko vp inomiririra nhanho yenhanho yemutsetse wekutapurirana. Sezvinogona kuonekwa kubva pamusoro apa, bandwidth inoenderana zvakanyanya neboka rinononoka, iro rinobva kune φ maererano nehuwandu. Naizvozvo, sezvo kureba kwemutsara kunowedzera kupfupika, bandwidth zvakare inova yakafara. Mune mamwe mazwi, kune hukama hwakasiyana pakati pe bandwidth uye chikamu chakakosha chetambo yekutapurirana, inova dhizaini chaiyo. Izvi zvinoratidza kuti mumasekete akagoverwa echinyakare, bandwidth inoshanda haisi nyore kudzora. Izvi zvinogona kuverengerwa nekuganhurirwa kwetambo dzechinyakare dzekutapurirana maererano nemadhigirii erusununguko. Nekudaro, zvinhu zvekurodha zvinobvumira mamwe ma paramita kuti ashandiswe mune metamaterial TLs, uye mhinduro yechikamu inogona kudzorwa kune imwe nhanho. Kuti uwedzere bhanwidth, zvinodikanwa kuti ive nenzvimbo yakafanana pedyo nekushanda kwemaitiro ekupararira. Artificial metamaterial TL inogona kuzadzisa ichi chinangwa. Zvichienderana nemaitiro aya, nzira dzakawanda dzekusimudzira bandwidth yeantenna dzinotsanangurwa mubepa. Nyanzvi dzakagadzira uye dzakagadzira maviri Broadband antenna akaremerwa nekupatsanurwa mhete resonators (ona Mufananidzo 7). Mhedzisiro inoratidzwa muMufananidzo 7 inoratidza kuti mushure mekurodha kupatsanurwa mhete resonator neyakajairwa monopole antenna, yakaderera resonant frequency mode inofara. Saizi yeinopatsanura mhete resonator yakagadziridzwa kuti iwane resonance padyo neiyo monopole antenna. Mhedzisiro yacho inoratidza kuti kana maviri maresonances achiwirirana, bandwidth uye radiation maitiro eiyo antenna anowedzerwa. Hurefu nehupamhi hwemonopole antenna ndeye 0.25λ0 × 0.11λ0 uye 0.25λ0 × 0.21λ0 (4GHz), zvichiteerana, uye kureba nehupamhi hwemonopole antenna yakatakurwa neinopatsanura mhete resonator ndeye 0.29λ0 × 0.21λ0 (2.9GHz) ), zvichiteerana. Kune yakajairwa F-yakaita antenna uye T-yakaumbwa antenna isina kupatsanurwa mhete resonator, iyo yakanyanya kuwana uye kugona kwemwaranzi kuyerwa mu5GHz bhendi i3.6dBi - 78.5% uye 3.9dBi - 80.2%, zvichiteerana. Kune antenna yakatakurwa neyakapatsanurwa mhete resonator, aya ma paramita ari 4dBi - 81.2% uye 4.4dBi - 83%, zvichiteerana, mu6GHz bhendi. Nekushandisa kupatsanurwa mhete resonator semutoro unofananidzwa pane monopole antenna, iyo 2.9GHz ~ 6.41GHz uye 2.6GHz ~ 6.6GHz mabhendi anogona kutsigirwa, anoenderana nechikamu bandwidths e75.4% uye ~ 87%, zvichiteerana. Mhedzisiro iyi inoratidza kuti kuyerwa kwebandwidth kunovandudzwa nekanosvika 2.4 nguva uye 2.11 nguva zvichienzaniswa neyechinyakare monopole antennas eanenge akatarwa saizi.
Mufananidzo 7. Antenna maviri e-broadband akatakurwa ne-split-ring resonators.
Sezvinoratidzwa muMufananidzo 8, mibairo yekuedzwa yecompact yakadhindwa monopole antenna inoratidzwa. Kana S11≤- 10 dB, iyo inoshanda bandwidth iri 185% (0.115-2.90 GHz), uye pa1.45 GHz, iyo yepamusoro yekuwana uye kugona kwemwaranzi ndeye 2.35 dBi uye 78.8% zvichiteerana. Iyo dhizaini yeantenna yakafanana neyekumashure-kumashure-kumashure matatu matatu sheet sheet, iyo inodyiswa ne curvilinear simba divider. Iyo truncated GND ine yepakati stub yakaiswa pasi pekudyisa, uye mana akavhurika resonant zvindori akagovaniswa pairi, izvo zvinowedzera bandwidth yeantenna. Iyo antenna inopenya ingangoita omnidirectionally, ichivhara mazhinji emabhendi eVHF neS, uye ese emabhendi eUHF neL. Ukuru hwemuviri we antenna ndeye 48.32 × 43.72 × 0.8 mm3, uye saizi yemagetsi ndeye 0.235λ0 × 0.211λ0 × 0.003λ0. Iyo ine zvakanakira saizi diki uye mutengo wakaderera, uye ine mukana wekushandisa mune Broadband wireless communication system.
Mufananidzo 8: Monopole antenna yakatakurwa nekupatsanurwa mhete resonator.
Mufananidzo 9 unoratidza planar antenna dhizaini ine maviri maviri akabatanidzwa meander waya zvishwe zvakadzika pasi kune yakadimburirwa T-yakaita pasi ndege kuburikidza neaviri. Saizi yeantenna i38.5 × 36.6 mm2 (0.070λ0 × 0.067λ0), uko λ0 ndiyo yemahara nzvimbo wavelength ye0.55 GHz. Iyo antenna inopenya omnidirectionally muE-ndege mune yekushanda frequency bhendi ye0.55 ~ 3.85 GHz, iine kuwana kwakanyanya kwe5.5dBi pa2.35GHz uye kugona kwe90.1%. Aya maficha anoita kuti antenna yakatsanangurwa ikwane kune akasiyana maapplication, anosanganisira UHF RFID, GSM 900, GPS, KPCS, DCS, IMT-2000, WiMAX, WiFi uye Bluetooth.
Fig. 9 Yakarongwa planar antenna chimiro.
2. Leaky Wave Antenna (LWA)
Iyo itsva leaky wave antenna ndeimwe yeakanyanya maapplication ekuona artificial metamaterial TL. Kune leaky wave antennas, mhedzisiro yechikamu chinoramba chiri β pane iyo radiation angle (θm) uye yakakura danda upamhi (Δθ) ndeiyi inotevera:
L ndiyo kureba kweantenna, k0 inhamba yewave munzvimbo yemahara, uye λ0 ndiyo yavelength munzvimbo yemahara. Ziva kuti mwaranzi inongoitika kana |β|
3. Zero-order resonator antenna
Chinhu chakasarudzika cheCRLH metamaterial ndechekuti β inogona kuve 0 kana frequency isina kuenzana ne zero. Zvichienderana nechinhu ichi, nyowani zero-odha resonator (ZOR) inogona kugadzirwa. Kana β iri zero, hapana shanduko yechikamu inoitika mune rese resonator. Izvi ndezvokuti chikamu chekuchinja chinoramba chiripo φ = - βd = 0. Mukuwedzera, resonance inoenderana chete nemutoro unogadzirisa uye inozvimiririra kureba kwechimiro. Mufananidzo 10 unoratidza kuti antenna yakarongwa inogadzirwa nekuisa maviri nematatu mayuniti ane E-shape, uye saizi yese i0.017λ0 × 0.006λ0 × 0.001λ0 uye 0.028λ0 × 0.008λ0 × 0.001 × 0.001 λ0, zvakateerana, λ0, zvichiteerana yenzvimbo yemahara pakushanda mafambiro e500 MHz uye 650 MHz, zvichiteerana. Iyo antenna inoshanda pamafrequency e0.5-1.35 GHz (0.85 GHz) uye 0.65-1.85 GHz (1.2 GHz), ine hama bandwidths ye91.9% uye 96.0%. Pamusoro pemaitiro ehukuru hudiki uye yakakura bandwidth, kuwana uye kugona kwekutanga neyechipiri antennas ndeye 5.3dBi uye 85% (1GHz) uye 5.7dBi uye 90% (1.4GHz), zvichiteerana.
Fig. 10 Inokurudzirwa kaviri-E uye katatu-E antenna zvimiro.
4. Slot Antenna
Nzira yakapfava yakatsanangurwa kuti ikwidze kuvhura kweCRLH-MTM antenna, asi saizi yayo yeantenna inenge isina kushanduka. Sezvinoratidzwa muMufananidzo 11, iyo antenna inosanganisira CRLH mayunitsi akaturikidzana akatwasuka pane mumwe nemumwe, ane zvigamba uye mitsetse mitsetse, uye pane S-yakaita slot pachigamba. Iyo antenna inodyiswa neCPW inoenderana stub, uye saizi yayo i17.5 mm × 32.15 mm × 1.6 mm, inoenderana 0.204λ0 × 0.375λ0 × 0.018λ0, apo λ0 (3.5GHz) inomiririra kureba kwenzvimbo yemahara. Mhedzisiro yacho inoratidza kuti antenna inoshanda mu frequency band ye 0.85-7.90GHz, uye yayo inoshanda bandwidth i161.14%. Kuwedzera kwemwaranzi kuwana uye kushanda zvakanaka kweantenna kunoonekwa pa3.5GHz, iri 5.12dBi uye ~ 80%, zvichiteerana.
Fig. 11 Iyo yakarongwa CRLH MTM slot antenna.
Kuti udzidze zvakawanda nezve antennas, ndapota shanya:
Nguva yekutumira: Aug-30-2024
