CP0805A0902DWTR

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RF directional couplers are used to tap off a portion of energy from a main line. This coupling is unidirectional, meaning it only couples in the direction of the arrow and does not couple power flowing in the opposite direction. A RF directional coupler is a discrete two-port passive device that can be used to sample an electromagnetic signal from one port and send a sampled signal to a second port. It is mainly used for signal sampling, gain measurement, power monitoring, impedance matching, etc.

The CP0805A0902DWTR is a precision 5-Ohm, 950-1000 MHz, 30dB directional coupler specifically designed for use as a transmit power monitoring and antenna control system in cellular base station applications. This directional coupler is capable of providing a low insertion loss and excellent repeatability of the forwarded power over the full frequency range. It also is highly linear allowing accurate measurements of small variations over the full input power range.

It is constructed using ceramic core material with high Q characteristics. It is based on the microstrip line, a transmission line composed of a conductor on the top side of a substrate, separating it from a ground plane on the bottom side. The substrate is a dielectric material such as glass, plastic, or quartz. An input coil is connected to the microstrip line, and a coupling element or slot creates a coupling to the output coil on the other side.

The performance of the CP0805A0902DWTR is optimized to provide a reduced insertion loss over the specified frequency range and while minimizing cross-coupling between input and output ports. The directional coupler has a typical return loss of -16dB and directivity of 21dB when tested with single-ended termination at the coupling port.

The output of the CP0805A0902DWTR can be used in numerous ways depending on the application. It can be used in reflectometer circuit designs to measure transmission power or SWR. Its coupling element also provides impedance matching when connected to signal sources at 950-1000 MHz frequency range.

In conclusion, the CP0805A0902DWTR is an ideal choice for directional coupler applications that require precision, low insertion loss, high directivity and wide frequency range. Its high-Q material and small physical size make it an excellent choice as a RF directional coupler.

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