Best Coax Switch

Introduction

The Best Coax Switch is a device used for switching between the main and standby transmitters, antennas, and dummy loads, and is the hub of a broadcast TV 1+1 or N+1 system. Its function is to switch the outputs of the two transmitters with the same antenna and broadcast each other.

Regardless of the structure of the coaxial switch, its normal operation is reflected in the two states of disconnection or connection of a set of antenna feeder system to the high frequency power output end of the active and standby transmitters. Commonly used coaxial switches are mechanical type and electronic type.

Fundamental

The principle of the Best Coax Switch is to change the direction of the bias magnetic field, realize the change of the permeability, and change the transmission constant of the signal to achieve the purpose of switching.

Switch drive

Any kind of coaxial switch has a corresponding drive circuit. The drive circuit is actually a pulse amplifier, which amplifies the control signal (usually TTL level) and outputs a large enough current or a high enough voltage. In practice, the PIN tube can be added to the circuit in reverse, and the positive high voltage - 5V can be used to reduce the power supply requirements.

Application

Best Coax Switch has a wide range of uses in RF/microwave systems, such as time multiplexers, time division channel selection, pulse modulation, transceiver switching, beam adjustment, etc.

The indicators of the switch are relatively simple, the turn-on loss is as small as possible, the turn-off loss is as large as possible, and the frequency band and power meet the system requirements.

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Testing Equipment

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