Various embodiments of antenna assemblies are disclosed herein. In one embodiment, the antenna assembly includes a reflector comprising a center opening, a feed-antenna subassembly situated in front of the reflector, a rear housing situated behind the reflector, and a pole-mounting bracket comprising a base plate situated between the reflector and the rear housing. The feed-antenna subassembly comprises a feed tube that houses at least one of: a transmitter circuit and a receiver circuit. The rear housing is coupled to a front side of the reflector via the center opening. The rear housing comprises a center cavity, and a back end of the feed tube is inserted in and coupled to the center cavity. The base plate is coupled to the reflector and the rear housing in such a way that decoupling between the base plate and the reflector requires a prior decoupling between the feed-antenna subassembly and the rear housing and a prior decoupling between the rear housing and the reflector.

Various embodiments of antenna assemblies are disclosed herein. In one embodiment, the antenna assembly includes a reflector comprising a center opening, a feed-antenna subassembly situated in front of the reflector, a rear housing situated behind the reflector, and a pole-mounting bracket comprising a base plate situated between the reflector and the rear housing. The feed-antenna subassembly comprises a feed tube that houses at least one of: a transmitter circuit and a receiver circuit. The rear housing is coupled to a front side of the reflector via the center opening. The rear housing comprises a center cavity, and a back end of the feed tube is inserted in and coupled to the center cavity. The base plate is coupled to the reflector and the rear housing in such a way that decoupling between the base plate and the reflector requires a prior decoupling between the feed-antenna subassembly and the rear housing and a prior decoupling between the rear housing and the reflector.

A long-distance radio frequency anti-metal identification tag is provided. When a bottom surface of an insulating spacer plate is attached to the surface of a metal object and an electronic tag reading device is used to read a radio frequency identification chip on a second antenna. A resonant cavity is formed between a slot of a first antenna and the surface of the metal object through the isolation of the insulating spacer plate, such that the second antenna located at the position of the resonant cavity resonates with an electromagnetic wave signal reflected on the surface of the metal object by the first antenna. The electromagnetic wave signal is transmitted to the radio frequency identification chip, or the feedback signal of the radio frequency identification chip is transmitted out. The overall UHF electronic tag is resistant to a metal interference and has the performance of long-distance reading.

An antenna device that includes a housing formed with an window surface and transmits and receives an electromagnetic wave through a cover member facing the window surface, comprises: a transmitting antenna that is provided inside the housing and transmits the electromagnetic wave to a side of the cover member; a receiving antenna that receives the electromagnetic wave; a circuit board that extends along a transmission direction of the electromagnetic wave and includes a board surface provided with the transmitting antenna and the receiving antenna; and a dielectric lens covering the window surface that narrows a beam of the electromagnetic wave transmitted from the transmitting antenna to transmit the beam outside the housing and collects the electromagnetic wave from outside the housing to transmit the electromagnetic wave to the receiving antenna.

An antenna device that includes a housing formed with an window surface and transmits and receives an electromagnetic wave through a cover member facing the window surface, comprises: a transmitting antenna that is provided inside the housing and transmits the electromagnetic wave to a side of the cover member; a receiving antenna that receives the electromagnetic wave; a circuit board that extends along a transmission direction of the electromagnetic wave and includes a board surface provided with the transmitting antenna and the receiving antenna; and a dielectric lens covering the window surface that narrows a beam of the electromagnetic wave transmitted from the transmitting antenna to transmit the beam outside the housing and collects the electromagnetic wave from outside the housing to transmit the electromagnetic wave to the receiving antenna.

In accordance with one or more embodiments, a method includes receiving a first wireless signal via a feed point on an antenna body, wherein the antenna body includes a dielectric core having a first reflective surface and a second reflective surface that are spatially aligned in a reflecting telescope configuration; reflecting the first wireless signal via the first reflective surface and the second reflective surface to an aperture of the antenna body; and radiating the first wireless signal from the aperture.

An antenna is provided from a dielectric wedge waveguide having an AMC wall feed structure 15 coupled thereto through a transition which matches the impedance of the AMC feed structure to dielectric wedge so as to ensure efficient transmission of RF signals between the AMC wall feed structure and the dielectric wedge. In some embodiments, the antenna may be implemented as a flush mounted or conformal antenna on an outer surface of a supporting platform.

An antenna is provided from a dielectric wedge waveguide having an AMC wall feed structure 15 coupled thereto through a transition which matches the impedance of the AMC feed structure to dielectric wedge so as to ensure efficient transmission of RF signals between the AMC wall feed structure and the dielectric wedge. In some embodiments, the antenna may be implemented as a flush mounted or conformal antenna on an outer surface of a supporting platform.

The present invention is a dual Ka-band, compact, high efficiency CP antenna cluster with dual band compact diplexers-polarizers that can be used as a basic building block for mobile satellite antenna arrays that require minimal dimensions and high efficiency.

A single Vivaldi antenna plate (half Vivaldi antenna) over a ground plane can be used to achieve a 50-ohm impedance, or two or more single plates over a ground plane to achieve other impedances. Unbalanced 50-ohm transmission lines, e.g., coaxial cables, can be used to directly feed the antenna.