Abstract:
PURPOSE: A broadband microstrip patch antenna is provided to reduce a volume and increase a bandwidth by using an electromagnetic coupling between an active patch and a static patch and make polarization conform by performing a mechanical beam tilting and an electric beam tilting at the same time. CONSTITUTION: The first patch antenna layer includes the first dielectric layer(120) and a ground conductor layer. The first patch antenna supplies an energy, which is supplied through a feeder connected with the first patch placed at the first dielectric layer, to the second patch(160), which is connected with the first patch. The first patch antenna layer receives an energy supplied by the second patch. The second patch antenna includes the second dielectric layer(170) and supplies an energy, which is supplied by the first patch connected with the second patch placed at the second dielectric layer. The second patch antenna layer supplies a received energy to the first patch. A separation part is disposed between the first patch antenna layer and the second patch antenna layer to separate the first patch antenna layer and the second patch antenna layer.
Abstract:
Disclosed is an electronic active phase control array antenna having two beams which comprises: a first array unit for performing phase shifting on radio waves received via satellite communication, combining them, and generating first beams on the basis of a first phase delay control value according to a first beam frequency; and a second array unit for performing phase shifting on the output value phase-shifted by the first array unit on the basis of a second phase delay control value for compensating for the phase delay difference according to a second beam frequency shifted through the first array unit, and generating second beams.
Abstract:
PURPOSE: An electronic active phase control array antenna is provided to improve a phase communication quality by compensating a directional error according to a frequency difference. CONSTITUTION: The first array phase displacement parts(302) displace phases of input radio waves through array antenna devices(301). The first beam signal couplers(303) couple output signals of the first array phase displacement parts(302) which are divided into 2N groups. The first beam signal coupler(304) couples signals from the first beam signal couplers(303) to output the first beam output. The second array phase displacement parts(305) displace phases of signals from the first beam signal couplers(303). The second beam signal coupler(306) couples signals from the second beam signal couplers(305) to output the second beam output.
Abstract:
PURPOSE: A structure of a mobile active antenna system and a satellite tracking method using the same are provided to enhance tracking accuracy, reduce tracking loss, and accurately track. CONSTITUTION: A structure of a mobile active antenna system comprises an antenna radome part(51) and an active antenna signal processing part(52). The antenna radome part(51) includes four groups of m active channel parents(511,512,513,514), four signal power combiners(515,516,517,518), a beam forming block(519), a rotating power(520), a tracking signal converter(521), a beam orientation controller(522), a rotation platform(530), a rotary jointer(523), a frequency converter(524) and a driving controller(528). The active antenna signal processing part(52) includes a satellite tracking processor(527), an electronic direction sensor(526), and a power module(525). The active channel parents includes radiating array, first low noise amplifiers, a signal power combiner, a second low noise amplifier, a phase shifter, a phase shifter drive, and a signal power attenuator. The beam forming block(519) includes four low noise amplifiers, four phase shifter, four phase shifter drive, and tow signal power combiner.
Abstract:
PURPOSE: A method for automatically tracing a satellite of an active antenna system is provided to improve a tracing time by defining a search zone of an antenna and searching only the search zone. CONSTITUTION: A method for tracing automatically a satellite of an active antenna system comprises the steps of: obtaining a search zone of a satellite by an electronic compass sensor in order to measure a location of a moving object; calculating a relative coordinate of the satellite for the moving object by using the location information; searching a satellite signal by moving the electronic compass sensor; and determining whether a signal is sensed from the satellite, or not; and measuring an azimuth, an elevation, a cosine of the elevation of the satellite if sensed.
Abstract:
본 발명은 마이크로스트립 패치 배열 안테나에 있어서 안테나 인입선으로부터 배열된 패치들 사이에서 전력을 분배 또는 결합하기 위한 마이크로스트립 패치 배열 안테나를 위한 전력 분배/결합기에 관한 것이다. 마이크로스트립 패치 배열 안테나를 위한 전력 분배/결합기는 기본적으로 원하지 않는 전자파의 방사없이 마이크로스티립 패치로 전력을 분배 또는 결합을 해주고, 안테나 인입선으로부터 마이크로스트립 패치까지 일정한 전기적 길이를 유지하여야 한다. 특히 전력 분배/결합기에서의 원하지 않는 전자파의 방사는 전체 안테나 방사 패턴의 변형을 유발하므로 전력 분배/결합기 설계시 상당한 주의를 요한다. 기존에 시용되던 T자 형태의 전력 분배/결합기는 구조가 간단하여 전력 분배/결합 및 일정한 전기적 길이 설계에는 용이하나, 마이크로스트립 선로상의 큰 불연속 구조를 가지므로 원하지 않는 전자파의 방사가 커지는 문제가 발생한다. 따라서, 본 발명에서는 부드러운 곡선의 Y자 형태의 전력 분배/결합기를 설계하여 마이크로스트립 선로 상의 불연속을 줄여 원하지 않는 전자파의 방사를 방지하고, 전체 안테나 방사 패턴을 원하는 대로 유지할 수 있는 마이크로스트립 패티 배열 안테나 제작을 가능하게 한다.
Abstract:
The frequency up-converting high power amplifier is comprised of TBU(transmit block up-converter) amplifying a level signal provided from an inverse multiplexing part(32) in an amplifier(59) and having the level signal feedbacked to an indoor apparatus through a receptive transmission line to check whether the transmission line is normal or not; in addition, the TBU having static voltage which flows through the receptive transmission line supplied to a TBU inner power supply through a voltage rectifier(58); the TBU equipped with a temperature sensing circuit(55) sensing inner temperature of the TBU and amplifying its output through an amplifier(54) to control a frequency up-converting part(100), whereby compensating for amplification change of a transmission signal amplifying device due to the inner temperature change; a high power amplifying means(200) being provided with a transmission RF signal of the frequency up-converting part(100) to high power amplify the transmission RF signal according to a static current signal provided from the inverse multiplexing part(32) to output the same to an antenna connecting part of an outside.
Abstract:
The interface connects a client to the local base by mixing the transceiving IF(Intermediate Frequency) with the control and alarm signals and by using two signal lines, and includes a demultiplexer for mixed signals from an indoor side; a rectifier; an alarm signal detector; a supervisor checking the alarm signal to cut off the rectifier; a level signal amplifier for an information signal adjusting the transmitting signal; a level signal detector the information signal; an adjuster for the gain of the transmitting IF according to the level detector; an on/off detector for a burst control signal; a switch for the transmitting IF under the burst control signal; a low noise amplifier for the received IF; a constant voltage rectifier rectifying the multiplexed signal for supplying it to an inner circuit; a 1st signal synthesizer for the constant voltage and the switched signal; a 2nd signal synthesizer for the constant voltage and the received IF.