A hybrid coupler divides the signal between two output ports with a 3 dB coupling, and the output signals can have a phase difference of 90 or 180 degrees.

A hybrid coupler divides the signal between two output ports with a 3 dB coupling, and the output signals can have a phase difference of 90 or 180 degrees. It is a special case of a four-port directional coupler. In addition, it can also be used to combine two signals and maintain high isolation between ports. It is essential in RF and Microwave systems for power division and combination. It is often used in communication, radar, commercial, and test equipment.

A hybrid coupler is known as a 3 dB coupler. 3 dB represents a halving of power. It is a fundamental component of RF and microwave systems. It takes an input signal and divides it into two output signals. The division is equal—half of the input power goes to each output. In addition, these signals maintain a precise phase relationship, typically either 90° or 180°. So, hybrid couplers can be divided into 90-degree and 180-degree hybrid couplers.

Corech is a leading 3 dB hybrid coupler supplier & manufacturer in China. Our hybrid couplers mate with PIN, 1.85mm, 2.4mm, 2.92mm, N, SMA, BNC, and TNC connectors. They deliver frequencies from 0.02 to 40.0 GHz with excellent phase and amplitude matching. Meanwhile, our hybrid couplers offer wide frequency coverage, low insertion loss, high directivity, and tight coupling. The power rating ranges from 20 watts to 500 watts. In addition, Corech is devoted to custom designs to print your logo or company information on the hybrid couplers. Over the years, our products have covered the USA, the UK, France, Italy, Sweden, Spain, Russia, South Africa, etc.

Types of Hybrid Coupler

• 90⁰ Hybrid Couplers
  This is utilized to equally split an input signal with a 90⁰ phase shift between the output ports. It is a four-port device. The 90⁰ hybrid coupler has two sets of cross-over transmission lines, each one-quarter wavelength in length. Also, the 90⁰ hybrids are referred to as the quadrature coupler. Any input signal will result in two equal amplitude signals that are quadrant (90° apart).
• 180⁰ Hybrid Couplers
  This is utilized to equally split an input signal with a 180° phase shift between the ports or to combine two signals that are 180° apart in phase. 180° Hybrid Couplers usually consist of a center conductor ring with a circumference of 1.5 times the wavelength (6 times the quarter wavelength). Each port separated 90⁰ from the other. This configuration generates a lossless device with a low VSWR, good phase-shifting and amplitude symmetry, high output isolation and match output blockages. This type of coupler is also known as a “rat race coupler”.

Parameters of Hybrid Coupler

• Phase Shift Type: 90⁰ or 180⁰.
• Frequency Range (GHz): The frequency bandwidth within which a hybrid coupler performs while meeting all of its specification limits.
• Amplitude Balance: Amplitude balance refers to the degree of signal balance between the two output ports of the hybrid coupler.
• Directivity: Measure the ability of the coupler to isolate signals propagating in forward and reverse directions.
• Insertion Loss: The signal loss is introduced by a hybrid coupler when it distributes the input signal to the output signal. Lower insertion loss means higher system efficiency and better signal transmission quality.
• Isolation: The degree of signal isolation between the two output ports of a hybrid coupler. Higher isolation can reduce mutual interference between signals and improve system performance and reliability.
• VSWR: The ratio of the incident signal compared to the reflected signal in a transmission line.

FAQs of Hybrid Coupler

1. What is the bulk production time and shipping time?
   – Bulk production time is 2-4 weeks. Shipping time is 3-6 days by express.
2. Is sampling available?
   – Yes, the sampling fee is XX USD. Then, the sampling time is 1-3 weeks.
3.  What are the types of hybrid couplers?
   – 90-degree hybrid couplers and 180-degree hybrid couplers.
4. How do I select a hybrid coupler?
   – It is important to know the parameters when selecting a hybrid coupler. Parameters include Phase Shift Type, Frequency, Insertion Loss, Isolation, etc.
5. What are the connector types of hybrid couplers?
   – PIN, 1.85mm, 2.4mm, 2.92mm, N, SMA, BNC, and TNC connector.
6. What is the frequency range of the directional couplers?
   – 0.02 GHz to 40 GHz.
7. Application of hybrid couplers？
   – Communication, radar, commercial, and test equipment.
8. Can the hybrid couplers be customized?
   – Yes. Our engineers can customize the hybrid couplers according to your needs. In addition, we can print company information or logos on the products.