Homemade strong anti-interference short wave receiving antenna ----- SW Antenna

Keywords: Double vibration high frequency head realizes double pot double star multi-user reception Double vibration high frequency head to achieve double pot double star multi-user reception The high frequency head in two ordinary C bands is merged into a C / C dual output high frequency head, which can be used as an antenna for both receivers without affecting each other, and can also be used for an antenna multi-user system and a small front-end system. First, you can use a pot of dual users directly. Second, when using more users, the high frequency head can be used as a single vibration, the double output high frequency head is used, one output port is 13V power supply, the other output port is 18V power; use two into four out, two Six-level switching switches to solve multi-user issues. Third, the small front system can use an output port as vertical polarization, and the other output port is directly used as a horizontal polarization. The specific method is as follows: First, two integrated C-band high frequency heads are found, followed by cutting after cutting of Fig. 1, then bonded, and the bonding is shown in Figure 2. Double pot, double star multi-user receive, generally double output high frequency head, with double 13V, 18V two-group combination switching scheme. With double 13V, the 18V two-group combination switch features two sets of 13V, 18V total of four input ports and four output ports in the input of the device, that is, four outlet switches. Use this scenario because the price of four-in-four switches is high, so it costs high. If the double vibration high frequency head and the 0 / 22kHz switch are combined, the price will drop. But if you use it directly, there will be problems with mutual interference without signal. To resolve this issue, you must add an isolation diode at each output port, as shown in Figure 3.

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