(1) Principles of wire selection: All wires have an impedance of 50 ohms, because it matches the impedance of the host with 50 ohms. (75 ohms is the standard for cable TV, and it will increase the standing wave of the host when used in a mobile phone signal booster)
(2) Cable: within 20 meters, the requirements for wire materials are generally not high. It is recommended to use 50-7 or 50-12 (1/2), 50-22 (3/4) wires for more than 50 meters.
(3) Power divider: Generally, the microstrip power divider has good indicators. The wiring method of the power divider is parallel connection, and there is a lot of waste of wire in some environments.
(4) Coupler: Wiring is convenient, one is connected in series; N antennas need N-1 couplers, which relatively increases the cost.
(5) Antenna frequency: As long as the frequency is correct, indoor and outdoor antennas are common.
(6) Antenna indicators: Small antenna indicators are poor and small in size; Yagi line indicators are average but directional; ceiling antennas and flat antenna indicators are better.
(7) Antenna selection: In the case of high freight costs, it is generally not recommended to use Yagi antennas, which are too bulky; you can choose a flat-panel antenna as an external antenna, which is also a directional antenna, or any antenna of the same frequency can be used as an external antenna. antenna.
(8) Outdoor antenna: After the host reaches full power, it is useless to increase the gain of the external antenna. Therefore, the outdoor antenna gain does not necessarily have to be as high as possible.
