摘要:
A multi-band antenna assembly that is operable to receive and/or transmit signals at one or more frequencies generally includes at least two radiating elements, a transmission line coupled to each of the at least two radiating elements, and a tunable match resonator coupled to the transmission line. The tunable match resonator is operable to vary input impedance of a signal received and/or transmitted by the antenna assembly by changing an electrical field within the tunable match resonator.
摘要:
A lossless broadband dipole antenna of length L having three collinear parts including a central part and two external parts. The parts are separated by slits, with a first feeding point for the antenna being located at a first end of one of the external parts nearest the slits, and a second feeding point being located at a second end of the other external part nearest the slits. The two feeding points of the antenna at the slits are arranged at a distance d from each other along the length L of the antenna, d/L being chosen such that d L = 0.37 ± 0.04 .
摘要翻译:长度为L的无损宽带偶极天线具有三个共线部分,包括中心部分和两个外部部分。 这些部分由狭缝分开,天线的第一馈电点位于最靠近狭缝的一个外部部件的第一端,第二馈电点位于最靠近狭缝的另一个外部部分的第二端 。 狭缝处的天线的两个馈电点沿着天线的长度L彼此间隔距离d布置,d / L选择为d L = 0.37±0.04。
摘要:
High-strength microwave antenna assemblies and methods of use are described herein. The microwave antenna has a radiating portion connected by a feedline to a power generating source, e.g., a generator. Proximal and distal radiating portions of the antenna assembly are separated by a junction member. A reinforcing member is disposed within the junction member to increase structural rigidity.
摘要:
High-strength microwave antenna assemblies and methods of use are described herein. The microwave antenna has a radiating portion connected by a feedline to a power generating source, e.g., a generator. Proximal and distal radiating portions of the antenna assembly are separated by a junction member. A reinforcing member is disposed within the junction member to increase structural rigidity.
摘要:
A dipole array is provided for use as an Ultra Short Pulse (USP) transmitter or receiver in UWB communications systems, which reduces the output pulse dispersion. Instead of having all the dipole elements serially fed by a transmission line, the feeding in the array is made independently through a central point and the radiation is emitted and received broadsided with respect to the array plane. This configuration minimizes the relative time delay between radiating resonance frequencies.
摘要:
Described is a dipole which may includes a feed line electrically coupled to a first antenna element; a balun electrically coupled to a second antenna element; and a short assembly slidably coupled to the feed line and the balun to create a short circuit at variable distances along the feed line and the balun.
摘要:
Provided is an ultra-wideband dipole antenna. In one embodiment, the antenna comprises a first outer sleeve, an intermediate sleeve surrounded by the first outer sleeve, a second outer sleeve above the first outer sleeve, a conductive interconnection interconnected the outer sleeves, and an inner coaxial conductor surrounded by the intermediate sleeve. A distance between the first outer sleeve and the intermediate sleeve can be changed for adjusting the generated capacitance for obtaining a required impedance matching in the resonance mode of an antenna operating bandwidth and an ultra-wideband characteristic. The antenna is particularly suitable for operating in a frequency range of 2.1 GHz to 11.7 GHz.
摘要:
Described is a universal dipole which may include a feed line coupled to a first fitting; a balun coupled to a second fitting; a first variable length antenna element coupled to the first fitting; a second variable length antenna element coupled to the second fitting; a support plate holding the feed line and the balun at a fixed spacing, the support plate including a short circuit path between the feed line and the balun; and a sliding short assembly attachable between the feed line and the balun to create a short circuit at variable distances along the feed line and the balun.
摘要:
The present invention discloses an integrated single-body antenna-transceiver assembly for a multi-channel multi-point distribution system (MMDS) transceiver for bi-directional signal transmission and reception. The assembly comprises a dipole antenna-body comprising a surrounded plastic-molded exterior with interior metal dipole antenna extending vertically from a metal attachment-seat surrounding a signal feed pin connected to the dipole antenna. The assembly further comprises an MMDS transceiver having a transmitter printed circuit board (PCB) and a receiver PCB enclosed in a waterproof-metal housing having an antenna-attachment pad including a signal feed pin opening. The dipole antenna-body is securely attached to the waterproof-metal housing by attaching to the antenna-attachment pad sealed with an O-ring with the signal feed pin extended through the signal feed pin opening to contact the receiver PCB, the diplexer, and the transmitter PCB. In a preferred embodiment, metal housing for enclosing the transceiver further includes mounting means for securely mounting a reflector thereon. In another preferred embodiment, the metal housing for enclosing the transceiver further includes two types of mounting means corresponding with either horizontal or vertical signal polarization for several types of reflectors thereon.
摘要:
An additively manufactured antenna device is disclosed, including a base portion and a body portion. The body portion is attached to the base portion and includes a lattice stiffening structure configured to eliminate secondary printing support.