Gịnị bụ log periodic antenna

NkeDebanye Antenna ogeAtụpụtara (LPA) na 1957 ma bụrụkwa ụdị ọzọ nke antenna na-adịghị agbanwe agbanwe.

Ọ dabere na echiche yiri nke a: mgbe a na-agbanwe antenna dị ka ụfọdụ ihe nhata τ ma ka nhata na nhazi mbụ ya, antenna nwere otu arụmọrụ mgbe ihe bụ f na τf. Enwere ọtụtụ ụdị nke antennas log periodic, n'ime nke Log Dipole Antenna (LDPA) tụrụ aro na 1960 nwere njirimara bandwidth sara mbara yana usoro dị mfe, yabụ ejirila ya mee ihe na obere mkpirisi, ultra-shortwave na ngwa ngwa ngwa.

Anten log log na-emeghachi usoro radieshon na njirimara impedance kwa oge. Otú ọ dị, maka antenna nwere usoro dị otú ahụ, ọ bụrụ na τ na-erughị 1, mgbanwe nke njirimara ya n'ime otu okirikiri dị ntakịrị, ya mere ọ na-adabere na ya ugboro ugboro.

Enwere ọtụtụ ụdị antennas log periodic, gụnyere log periodic dipole antennas na monopole antennas, log periodic resonant antennas V-resonant antennas, log periodic spiral antennas, wdg, n'ime nke a na-ahụkarị bụ antenna dipole log periodic.

Dị ka eriri ultra-wideband, mkpuchi bandwit dị obosara nke ukwuu, ruo 10: 1, a na-ejikarị eme ihe maka mgbama mgbama, nkesa ime ụlọ na mkpuchi mgbama elevator. Na mgbakwunye, enwere ike iji antenna oge logarithmic dị ka ebe nri maka antennas reflector. Ebe ọ bụ na mpaghara dị irè na-eji ugboro ugboro na-arụ ọrụ, ndịiche dị n'etiti mpaghara dị irè na ebe a na-elekwasị anya na bandwit niile na-arụ ọrụ ga-abụrịrị n'ime oke nnabata enwere ike n'oge echichi.