What is microstrip directional coupler?

The microstrip realization is typical of most directional couplers in that it comprises two parallel signal lines with the electric and magnetic fields of a signal on one line inducing currents and voltages on the other.

What is 20db directional coupler?

20 dB Directional Couplers They have a typical coupling tolerance of +/- 1 or 1.25 dB and most models handle 50 watts input power. These directional couplers are designed to operate in a 50-ohm system, and are optimized for best matching and high directivity with flat coupling response.

What is meant by 3 dB directional coupler?

Introduction. Couplers and hybrids are devices in which two transmission lines pass close enough to each other for energy propagating on one line to couple to the other line. A 3dB 90° or 180° hybrid splits an input signal into two equal amplitude outputs.

What is the difference between directional coupler and hybrid coupler?

An essential feature of directional couplers is that they only couple power flowing in one direction. Power entering the output port is coupled to the isolated port but not to the coupled port. A directional coupler designed to split power equally between two ports is called a hybrid coupler.

Is also called as 3 dB coupler?

Hybrid couplers are the special case of a four-port directional coupler that is designed for a 3-dB (equal) power split.

How many holes can be there in a directional coupler?

A two-hole directional coupler is designed to meet the ideal requirement of directional coupler, which is to avoid back power. Some of the power while travelling between Port 1 and Port 2, escapes through the holes 1 and 2. The magnitude of the power depends upon the dimensions of the holes.

What does a combiner do in RF?

RF combiner: An RF combiner is used to combine RF from a number of different sources. This is achieved while maintaining the characteristic impedance of the system.

What is a 10dB directional coupler?

10 dB directional coupler is a common RF/MW component that can be found in almost any RF systems. AWG produces 10dB directional coupler from as low as 200MHz up to 26.5 GHz. One of the most commonly used directional coupler is ADC-800M-2500M-10-01.

What is the range of microwave directional couplers?

SigaTek offers a wide range of Microwave RF directional couplers 6 dB 10 dB 20 dB and 30 dB covering the frequency range of 500 Mhz to 40 Ghz. All directional couplers are designed using stripline techniques and with specifications that exceed commercial applications. Microwave Directional couplers are used in a wide range of applications.

What is the range of directional couplers offered by sigatek?

SigaTek offers a wide range of Microwave RF directional couplers 6 dB 10 dB 20 dB and 30 dB covering the frequency range of 500 Mhz to 40 Ghz. All directional couplers are designed using stripline techniques and with specifications that exceed commercial applications.

How does the adc-800m-2500m-10-01 directional coupler work?

The directional coupler is designed using state-of-the-art microstrip directional coupler with a 50 Ohm impedance. ADC-800M-2500M-10-01 is optimized for frequency of operation from 800MHz to 2.5 GHz and thus is wideband enough to cover most mobile communications network. The coupling factor is 10 dB and it has a minimum directivity of 20 dB.

What is coupling in directional coupler?

The Coupling factor of a directional coupler is the ratio of incident power to the forward power, measured in dB.

What is the function of directional coupler?

Directional couplers function as the main element in reflection and transmission measurements, power monitoring, and leveling applications. By properly designing directional couplers, any required amount of electromagnetic power can be coupled from one transmission line to another.

What are the two types of directional coupler?

There are different types of directional couplers like single, dual directional, coaxial, waveguide and even combination types.

What is hybrid combiner?

The hybrid combiner is a broadband adder subtractor circuit used to split and combiner RF signals. It is related to the 3 dB hybrid which is based on transmission lines and is most commonly used in high power broadband applications.

What is the main advantage of using directional coupler?

Advantages: Performance can be optimized for both forward and reverse paths. Higher directivity and isolation can be achieved. Provides forward and reverse coupling.

What is the difference between a directional coupler and a splitter?

The way we define it, a coupler (usually) has four ports, uses no “internal” resistors and has one isolated port that is terminated. A splitter is (usually) a three-port, is non-directional, and requires internal resistors (like a Wilkinson) and has no isolated port.

Are coax couplers directional?

Coax directional couplers can be used for sample power from a line without altering the characteristics of the line. Power measurements are achieved by inserting a directional couple and using simple, low level detectors or field strength meters and power measuring equipment.

What is RF diplexer?

A diplexer is a passive (RF) filter component with three ports, which enables the sharing of a common antenna between two distinct frequency bands. This technology allows transmitters operating on different frequencies to use the same antenna and each band may both transmit and/or receive.

What is a combiner splitter?

As the name implies RF power splitters / dividers and combiners are used to split a single RF line into more than one line and divide the power, and similarly combiners are used to combine more than one feed line into a single one. RF power combiners and RF splitters are the same items.

A two-hole directional coupler is a device in which two connected waveguides have 2 holes present between them. One waveguide is known as primary main waveguide while the other is said to be the auxiliary waveguide.

What is the value of directivity of an ideal directional coupler?

An ideal directional coupler should have infinite directivity. In other words, the power at port 4 must be zero because port 2 and port 3 are perfectly matched. Actually, well-designed directional couplers have a directivity of only 30 to 35 dB.