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The Key Of The Technology Of 2-axis Car Satellite TV Antenna

Edit: Dotogo Tecchnologies Co.,Ltd      Date:Jul 24, 2017



The key of the technology of 2-axis Car Satellite TV Antenna

Because in the production of 2-axis Car Satellite TV Antenna, adopted different from reflection type parabolic 2-axis Car Satellite TV Antenna technology, makes the production technology and production technology are not the same, and 2-axis Car Satellite TV Antenna to achieve the desired electrical properties is not easy, also is the key to loss and matching problem.

1. Transmission loss of feeder. As we already know, the microstrip transmission line is used in the oscillator type 2 - axis car satellite TV antenna, and the transmission waveguide is used in the slot 2-axis car satellite TV antenna. Although the two transmission medium can be better in the 2 axis automobile transmission effect in the satellite TV antenna, but work in Ku band 12 GHZ conditions, design and manufacture of the slightly improper, will have a larger loss.

2. Connection loss. Whether vibrator type 2-axis Car Satellite TV Antenna, or a slot 2-axis Car Satellite TV Antenna, on the 2 axis automobile satellite dishes have lots and lots of oscillator or aperture radiation unit consisting of 2-axis Car Satellite TV Antenna array, the radiating element (microstrip or waveguide) with a transmission line connection, they tend to be two parallel connected with a transmission line. We know that each time the circuit is in parallel, the impedance changes once, and it is possible to increase the loss, the more connections, the greater the loss. The more radiation units, the worse the connection. So we say, in the 2-axis Car Satellite TV Antenna, at least one hundred or hundreds of radiating element, to connect them one by one, and to match, this is very not easy to do. The more radiation units, the harder to match. Unmatched joins are bound to increase wear and tear.

3, 2 axis in vibrator type automobile satellite TV antenna, microstrip transmission line is printed on the circuit board, not only have a loss in the transmission, but also can produce radiation, this radiation produces loss not only, but also interferes with the original 2-axis Car Satellite TV Antenna design of the overall direction.

4. In the slot 2-axis car satellite TV antenna, the size design of the waveguide is very accurate, the processing technology of the waveguide cavity is very high, otherwise it will increase the loss.

The input impedance of the 2-axis satellite TV antenna is the impedance value obtained from the interface between the transceiver and the 2-axis car satellite TV antenna to the terminal of the 2-axis Car Satellite TV Antenna. The value of 2 axis car satellite TV antenna radiation efficiency, 2 axis car satellite antenna gain fluctuations, 2-axis Car Satellite TV Antenna front-end power capacity has a great influence. Phone 2-axis Car Satellite TV Antenna is a kind of standing wave 2-axis Car Satellite TV Antenna, 2-axis Car Satellite TV Antenna impedance mismatch, will lead to a large amount of signal reflection, make 2-axis Car Satellite TV Antenna radiation efficiency is reduced, at the same time because of the influence of the reflection makes 2-axis Car Satellite TV Antenna gain in the wideband jitter, if 2-axis Car Satellite TV Antenna standing wave is 6, mobile front-end breakdown voltage will be reduced to 1/6 of the original, and the power capacity will drop. The influence of the satellite TV antenna on the 2-axis car satellite TV antenna is immobile. The standing wave requirement of the 2 axis car satellite TV antenna, we currently have a unified requirement of less than 3.

The bandwidth of the satellite TV antenna of the 2-axis car is the range of frequency band that satisfies the whole index of the 2-axis car satellite TV antenna. The working frequency refers to all frequencies within the bandwidth range of the 2 axis car satellite TV antenna. Work to limit bandwidth by multiple indicators, so need to take the narrow bandwidth of bandwidth, mobile phone in the 2-axis Car Satellite TV Antenna, pattern bandwidth, polarized bandwidth limit imposed by the factors such as bandwidth is greater than the impedance bandwidth, so generally in the mobile phone 2-axis Car Satellite TV Antenna to meet the bandwidth of the standing wave range as requested 2-axis Car Satellite TV Antenna bandwidth.

Figure 2-axis Car Satellite TV Antenna beam direction is used to describe the radiation by 2 axis automobile satellite dishes out of any position in the relationship between the energy and space, by direction figure that out by 2-axis Car Satellite TV Antenna radiation of electromagnetic wave in space every position of relative strength or absolute strength. There is no doubt that the level 2 axis automobile satellite antenna pattern is omni-directional, mobile phone actually figure 2-axis Car Satellite TV Antenna beam direction is not important, mainly in the process of cell phone use, the car phone 2 axis satellite TV antenna radiation characteristics with single axis 2 car satellite TV antenna radiation characteristics are not the same. The direction of the satellite TV antenna of the mobile phone 2 axis will only require the horizontal plane to be approximately the whole direction.