Antennas with cosecant square radiation pattern both upward and downward for FWA

Phase Correction Method for GO Designed Dielectric Lens Horn Antenna

“…Amplitude and phase distributions on apertures of the antenna are shown in Fig.4(a) and Fig.4(b), respectively. In Fig.4(a), amplitude is sufficiently agree with the design objective given by equation (2). In Fig.4(a), it is observed that the amplitude distribution is successfully designed by a dielectric lens insertion.…”

“…TM01 mode horns were mainly employed as a reflector antenna feeds so as to achieve omni-directional coverage around the vertical axis [1] [2]. When a shaped beam was designed in the vertical plane, low sidelobe characteristics became important [2].…”

“…When a shaped beam was designed in the vertical plane, low sidelobe characteristics became important [2]. A dielectric lens horn was introduced.…”

Shaped Omnidirectional Reflector Fed by a Dielectric Lens Associated with a Coaxial Feed Horn

“…For operation in millimeter waves, shaped omnidirectional refector antennas can provide efcient anikd broadband communications with compact confgurations. Design examples with a single and dual refector have been explored for omnidirectional coverages [1][2][3][4][5]. Tese antenna design examples are usually fed by a small aperture horn that generates radiation patterns with large beamwidth [1][2].…”

Síntese De Antenas Refletoras Utilizando Seções Cônicas E Superfícies Quádricas Confocais

“…Diferente de [61], aquié utilizado como geratriz do subrefletor, seção de elipse com eixo deslocado ao invés de parábola, de forma a minimizar a perda de retorno da antena. Além disto, para prover uma distribuição uniforme de potência na região de cobertura,é utilizado como função objetivo um diagrama de radiação cossecante ao quadrado [14], [73], [74]. Outro aspecto interessante da abordagemé a utilização das coordenadas complexas introduzidas em [39] para representação das direções, facilitando o desenvolvimento da formulação e, sobretudo, a imposição da Lei de Snell.…”