Menene eriya lokaci-lokaci log

TheLog Antenna na lokaci-lokaci(LPA) an gabatar da shi a cikin 1957 kuma wani nau'in eriya ce mara mitar mitoci.

Ya dogara ne akan irin wannan ra'ayi mai zuwa: lokacin da aka canza eriya bisa ga wani ma'auni mai mahimmanci τ kuma har yanzu yana daidai da ainihin tsarinsa, eriya yana da irin wannan aikin lokacin da factor shine f da τf. Akwai nau'ikan eriya na lokaci-lokaci da yawa, daga cikinsu Log Dipole Antenna (LDPA) wanda aka gabatar a cikin 1960 yana da halaye masu faɗi da yawa da tsari mai sauƙi, don haka an yi amfani da shi sosai a cikin gajeriyar igiyar ruwa, matsananci gajeriyar igiyar ruwa da makada ta microwave.

Eriya na lokaci-lokaci kawai tana maimaita tsarin radiation da halayen impedance lokaci-lokaci. Koyaya, don eriya mai irin wannan tsarin, idan τ bai cika ƙasa da 1 ba, canjin halayensa a cikin zagayowar ɗaya yana da ƙanƙanta, don haka yana da asali mai zaman kansa daga mita.

Akwai nau'ikan eriya na lokaci-lokaci da yawa, gami da eriya na lokaci-lokaci dipole da eriyar monopole, eriya na lokaci-lokaci resonant V-dimbin yawa, eriya na karkace lokaci-lokaci, da sauransu, daga cikin abin da ya fi kowa shine eriyar dipole na lokaci-lokaci.

A matsayin eriya mai faɗin ultra-wideband, kewayon bandwidth yana da faɗi sosai, har zuwa 10: 1, kuma galibi ana amfani dashi don haɓaka sigina, rarraba cikin gida da ɗaukar siginar lif. Bugu da kari, eriyar logarithmic na lokaci-lokaci kuma ana iya amfani da ita azaman tushen ciyarwa don eriya mai haskakawa ta microwave. Tun da ingantaccen yanki yana motsawa tare da mitar aiki, sabawa tsakanin yanki mai tasiri da mayar da hankali a cikin duka rukunin mitar aiki dole ne ya kasance cikin kewayon haƙuri da aka yarda yayin shigarwa.