I-ANT0104 Ultra WideBad Omnidirectional Antenna

Ngokulinganiswa okusebenzayo kwe-Antenna Directivity Cooffry Offecry okwanele, sikuchaza kusuka ekubumbeni kwebanga le-Antenna Radiation Beam.

I-Directivity D yisilinganiso se-Power Power Power Power Po (θ, φ) max to value wayo eshokolweni

Ngaphezu kwalokho, ukuqondiswa d kungabalwa ngefomula elandelayo:

D = 4 PI / ω ča

Ekusebenzeni, ukubalwa kwe-logarithmic kwe-D kuvame ukusetshenziselwa ukumela inzuzo eqondayo ye-antenna:

D = 10 log ⁡ d d d

Okungenhla kwe-Diretivity D kungahunyushwa njengesilinganiso sebanga lomphemthe (4π rad²) I-Antenna Beam Range ω ω ω. Isibonelo, uma i-antenna ibeka kuphela endaweni ephezulu ye-hemispherical kanye nebanga layo le-beam ω _a = 2π rad², khona-ke ukuqondiswa kwalo yile:

Uma i-logarithm yezinhlangothi zombili ze-equation ezingenhla ithathiwe, inzuzo yokuqondisa inzuzo ye-antenna ehlobene ne-isotropy ingatholwa. Kumele kwaziwe ukuthi le nzuzo ingakhombisa kuphela imisebe yephethini ye-antenna eqondayo, kuyunithi ye-DBI, ngoba ukusebenza kahle kokudlulisela akubhekwa njengenzuzo efanelekile. Imiphumela yokubala imi ngale ndlela elandelayo:

3.01 Iklasi:: DBI D = 10 Log ⁡ 2 Izinto ezibonakalayo

Amayunithi we-Antenna Anzuzo yi-DBI ne-DBD, lapho:

I-DBI: Ngabe inzuzo etholwe yimisebe ye-antenna ehlobene nomthombo wamaphuzu, ngoba umthombo wamaphuzu u-ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω ω

I-DBD: Ingabe ukuzuza kwemisebe ye-antenna ehlobene ne-Half-Wave Dipole Antenna;

Ifomula yokuguqulwa phakathi kwe-DBI ne-DBD yile:

2.15 Iklasi:: I-DBI 0 DBD Material