It’s not uncommon for a radio enthusiast to install multiple antennas on the same radio, so it’s perfectly normal to hang a bunch of coaxial cables behind the rig for exchange, as you might expect. If this describes your radio experience, you may be interested in the antenna switcher made by [g3gg0], which uses a solid-state RF switch controlled by the esp32 module.
Its core is the mxd8625c RF switch, which is a micro device specially designed for mobile phone applications. Its insertion loss is only a small part of decibels, and in some way eliminates the need for any blocking capacitor. It is controlled by the GPIO line, which connects a pair of antennas to distribute the three antennas to two radios, and can easily switch the preamplifier if necessary. More interestingly, we note that the device is also suitable for transmitter switching. The maximum throughput is 36.5 DBM, and our calculation is about 4.5 W. Obviously, the board can be used for receiving, but anyone considering the transceiver project may be interested in the chip. At the same time, the software is a relatively simple web-based control, which links the screen control to GPIO.
If you are interested in solid-state RF switches, remember that at lower frequencies, they can be very simple.
