Feed horn

About: Feed horn is a research topic. Over the lifetime, 2395 publications have been published within this topic receiving 26548 citations. The topic is also known as: feedhorn.

Compact size high gain lens corrected pyramidal horn antenna for 71–76GHz band

Abstract: This paper presents the design of high gain compact size pyramidal horn lens antenna for 71-76GHz band. The horn antenna aperture is covered by a planar single layer all dielectric lens that is composed of two dimensional periodic unit cells of λ/2 periodicity and low loss (≤1dB). The unit cell is used to design a 21 unit cell × 21 unit cell flat lens which occupied an area of 42mm × 42mm × 4.35mm. The lens horn antenna is well matched (S 11 <;10dB) from 70-80GHz without additional impedance matching layers, peak gain of 28.9dB@72.5GHz and aperture efficiency of 60% are achieved. The radiation characteristics of the lens are calculated using finite element method (HFSS) and finite integral technique (CST Microwave Studio).

Aerating type portable parabolic reflector antenna

Abstract: The invention relates to an aerating type portable parabolic reflector antenna which comprises an aerating support ball body (1), a corrugated horn feed source (7) and a feed source support (12). A parabolic reflector (11) built in the aerating support ball body (1) divides the aerating support ball body (1) into two independent sealing hemispherical ball bodies, a pressure measuring port (5) and an aerating port (4) are respectively arranged on an upper ball body and a lower ball body, the corrugated horn feed source (7) is installed on the outer portion of the aerating support ball body (1) through the feed source support (12) and is located at the focus point of the parabolic reflector (11), and signals of the feed horn source (7) are transmitted to a satellite signal processing terminal (9) through a cable (8). The antenna adopts aerating type design, the ball body is made of nylon thin films, and weight of the antenna can be controlled within 10kg when diameter of the antenna reaches 1.8m or 2.4m. Simultaneously, the antenna can be folded to be smaller in non-aerating state, and portable performance is greatly improved.

Evaluation of fan beam carbon fiber reinforce plastics offset parabolic reflector antenna for W-band millimeter-wave radar systems

Abstract: This paper discusses an evaluation of a fan beam carbon fiber reinforce plastics (CFRP) offset parabolic reflector antenna for W-band millimeter-wave radar systems. For the radar applications with mechanical azimuth scanning systems, it is required to achieve a narrow azimuth radiation pattern, as well as a relatively wide elevation pattern. Firstly, the CFRP parabolic reflector, which has the aperture size of 327 mm × 300 mm, is fabricated using 1K woven fabrics. Next, the maximum gain and radiation pattern are measured between 75 GHz and 110 GHz. Finally, the CFRP parabolic reflector with the 15.0 mm-diameter conical horn feeding confirms elevation fan beam characteristics and a gain of almost 40 dBi at 96 GHz.

Time-varying fading reduction method for digital mobile radio

Abstract: The method involves switching bursts of a transmitter output signal or a receiver input signal alternating between several antennas. Preferably, the radio receiver and the radio transmitter have each at least two separate antennas (AS1,AS2) which receive and transmit the same information (I), respectively, in the form of bursts. The information is processed in a signal conditioning circuit (AS) in the transmitter to form bursts. The receiver and the transmitter each include a switch (U1) which switches the two antennas between two bursts.

Wide-Angle-Scanning Reflectarray Antennas Actuated by MEMS

Abstract: An effort to develop large-aperture, wide-angle-scanning reflectarray antennas for microwave radar and communication systems is underway In an antenna of this type as envisioned, scanning of the radiated or incident microwave beam would be effected through mechanical rotation of the passive (reflective) patch antenna elements, using microelectromechanical systems (MEMS) stepping rotary actuators typified by piezoelectric micromotors It is anticipated that the cost, mass, and complexity of such an antenna would be less than, and the reliability greater than, those of an electronically scanned phased-array antenna of comparable beam-scanning capability and angular resolution In the design and operation of a reflectarray, one seeks to position and orient an array of passive patch elements in a geometric pattern such that, through constructive interference of the reflections from them, they collectively act as an efficient single reflector of radio waves within a desired frequency band Typically, the patches lie in a common plane and radiation is incident upon them from a feed horn