The rotary field is very strong and will cause any RF/microwave signals in the frequency band of interest at one port to follow the magnetic flow to the adjacent port and not in the opposite direction.įigure 1 Shows the schematics for a circulator and an isolator. The interaction of the magnetic field to the ferrite material inside isolators and circulators create magnetic fields similar to the water flow in the cup. You can also see that it would be impossible for the pepper to move in a counterclockwise direction because the water motion is just too strong. If you sprinkle some pepper into the cup and continue to stir, you will notice that the pepper easily follows the circular motion of the water. To understand how these components control the signal flow, think of a cup of water into which you place a spoon and stir in a clockwise motion. Examples of both applications will be covered later in this article. An RF circulator is a three-port ferromagnetic passive device used to control the direction of signal flow in a circuit and is a very effective, low-cost alternative to expensive cavity duplexers in base station and in-building mesh networks. Isolators are commonplace in laboratory applications to separate a device under test (DUT) from sensitive signal sources. (2): Unilateral assembly gap of components should be <0.05mm.An RF isolator is a twoport ferromagnetic passive device which is used to protect other RF components from excessive signal reflection. (1): The installation hole (slot) size of the components shall be controlled as follows: length x width x height. ![]() Generally, we don't recommend soldering for lead wires. Use the pointed soldering iron to solder the connection line in turn, soldering iron setting temperature is 210 ✬ ~ 230 ✬,soldering time less than 2 seconds per time, solder as little as possible and keep solder joints smooth and round. is ≤183 ✬, preload the gold-plated copper foil connection line into a certain arc and lap coat the microstrip line with flux. It is recommended to use the soldering material which melting temp.
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