A portable communication device and antenna device with removeable matching circuit is provided. The antenna device includes: a base; an antenna element; an electrical connector at the base; a matching circuit removably positioned between the electrical connector and the antenna element, the electrical connector and the antenna element in electrical communication via the matching circuit; and a shell removably attached to the base, the shell surrounding and protecting the matching circuit. The portable communication device includes the antenna device, for example removably attached to an antenna receptacle.

A radio and power pole that includes a pipe defining a longitudinal interior cavity for storing modular electronic equipment (e.g., radios) is described. The radio and power pole can also include mounting channels extending longitudinally proximate to an interior surface of the interior cavity of the pipe, a structural spine extending longitudinally through the interior cavity of the pipe, ribs spaced apart from one another proximate to the interior surface throughout the interior cavity of the pipe, doors for accessing the interior cavity of the pipe, and a vent trap. The radio and power pole can be configured as a direct bury radio and power pole (possibly including one or more vaults). A radio and power pole can include a precast pier connected to the pipe and configured to support the pipe when the pier is inserted into the ground. A radio and power pole can include a bench disposed about the pipe.

A radio and power pole that includes a pipe defining a longitudinal interior cavity for storing modular electronic equipment (e.g., radios) is described. The radio and power pole can also include mounting channels extending longitudinally proximate to an interior surface of the interior cavity of the pipe, a structural spine extending longitudinally through the interior cavity of the pipe, ribs spaced apart from one another proximate to the interior surface throughout the interior cavity of the pipe, doors for accessing the interior cavity of the pipe, and a vent trap. The radio and power pole can be configured as a direct bury radio and power pole (possibly including one or more vaults). A radio and power pole can include a precast pier connected to the pipe and configured to support the pipe when the pier is inserted into the ground. A radio and power pole can include a bench disposed about the pipe.

Disclosed is a system and method for a complex domain radio frequency (RF) frontend, adaptive beamforming can separate the relatively slowly changed waveform delay information required from wideband RF signals, upon which a self-contained beamforming system is implemented with a low-speed baseband. By introducing vector RF multipliers in the frontend of the present invention, the amplitude and phase of RF signals are simultaneously controlled by the real and imaginary parts of complex numbers, such that beamforming algorithms derived in complex domain can be directly applied without any form of transformation. By doing so, the massive use of conventional T/R modules and high-speed baseband devices can be avoided, thus simplifying the realization and decreasing the cost of wideband digital beamforming systems for use in low cost, power efficient beamforming applications.

A line conductor is configured so as to be arranged between a lower surface conductor and an upper surface conductor in parallel with the lower surface conductor in such a way as to extend around the periphery of a hollow cylindrical conductor in a state in which an end is connected to a side surface of the hollow cylindrical conductor and another end is open. As a result, efficient supply of power to a conductive liquid can be performed without disposing a conducting tube having a length of approximately /4 at an operating frequency.

The disclosure relates to an array antenna, and more specifically, the array antenna configured by arranging a plurality of antenna elements at close positions. An array antenna is provided. The array antenna includes a first antenna operating in a first mode, and a second antenna operating in a second mode, wherein a correlation between an electric field of the first mode and an electric field of the second mode falls below a first threshold which is predetermined, or a correlation between a magnetic field of the first mode and a magnetic field of the second mode falls below a second threshold which is predetermined.

The disclosure relates to an array antenna, and more specifically, the array antenna configured by arranging a plurality of antenna elements at close positions. An array antenna is provided. The array antenna includes a first antenna operating in a first mode, and a second antenna operating in a second mode, wherein a correlation between an electric field of the first mode and an electric field of the second mode falls below a first threshold which is predetermined, or a correlation between a magnetic field of the first mode and a magnetic field of the second mode falls below a second threshold which is predetermined.

An antenna apparatus includes a ground plate, a radiator, and a signal source. The radiator is disposed on the ground plate. The signal source is configured to feed an electromagnetic wave signal of a first frequency band into the radiator. A first slot and a second slot are disposed on the ground plate. Both slots are closed slots and surround the radiator, and are used to restrain current distribution on the ground plate.

An antenna apparatus includes a ground plate, a radiator, and a signal source. The radiator is disposed on the ground plate. The signal source is configured to feed an electromagnetic wave signal of a first frequency band into the radiator. A first slot and a second slot are disposed on the ground plate. Both slots are closed slots and surround the radiator, and are used to restrain current distribution on the ground plate.

The present disclosure pertains to an antenna assembly configured to inconspicuously provide mobile communication in rugged or tactical environments. Some embodiments may include: a flexible conductor configured to receive and/or emit electromagnetic radiation; a printed circuit board (PCB) configured to match characteristic impedances; and a connector configured to mate with another connector associated with a radio or amplifier, the PCB being potentially disposed within an interior portion of the connector of the antenna assembly.