Cavity Couplers

Raygnal Technology (Shenzhen) Co.,Ltd: Your Professional Cavity Couplers Manufacturer!

Technology is growing fast because of innovation. With this in mind, Raygnal was launched. The company's main products include passive component, cavity couplers, fixed wireless phone, fixed wireless terminal, lora helium miner hotspot flarm booster, etc.

Cavity Coupler

Cavity filter is designed with Aluminium to get performance of splitting the RF signals. It can support 698-2700MHz for widely use at indoor distribution systems.

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Why choose us

Comprehensive wireless solutions

As a specialist in telecommunications, Raygnal is a high-tech enterprise which is dedicated to serving cellular network providers and individuals by offering comprehensive wireless solutions worldwide.

Quality assurance

The mission for RaygnalTechnology is to satisfy customers by providing technical consultation as well as innovative telecommunication products, at affordable price along with reliable quality.

R&d team

The company has a professional research and development capability and a research and development team with a leading domestic technical level.

Cheap price

We have a professional purchasing team and costing team, trying to reduce costs and profits, and provide you with a good price.

Types Of Cavity Couplers

Cavity radio frequency directional coupler
This coupler derives most of its fields from the stored fields in the cavity rather than the propagating fields. The coupling may change when frequency fields change because of the small number of coupled modes in the cavity. This is a typical RF directional coupler made of metals and used for many years in microwave technology. The internal resonant structure of the RF directional coupler is complex and may take several forms, like rectangular, circular, notched, waveguide, and elliptical RF directional couplers. In function, these couplers exhibit different coupling values, bandwidths, and operational modes.

Coupling RF directional signal attachment
A signal attachment coupler is used to measure a signal or send a portion of the signal through another component with minimum impact on the original signal. A perfect example is a 20 dB coupler that takes out 1% of the signal for monitoring. Signal coupling couplers use both resistive and capacitive coupling. RF signal attachment couplers find usage in telecommunications to extract small portions of signals for monitoring or processing without noticeably attenuating the primary output.

Hybrid directional coupler
Hybrid directional couplers have four ports and perform two functions at once: splitting power among two outputs and transmitting a signal through one input while reflecting a fraction of it through another. These couplers are widely used in antenna feeds, where they split a single transmit signal between two antennas while allowing received signals from both antennas to combine coherently. Hybrid couplers utilize various coupling mechanisms, including resistive, capacitive, and inductive elements in a compact design.

Product Specifications

Frequency	698MHz ~ 2700MHz
Coupler (dB)	05	06	07	10	15	20	30
Range (±)	1.0	1.0	1.0	1.0	1.0	1.5	1.5
Loss(dB)	≤2.1	≤1.70	≤1.40	≤0.80	≤0.40	≤0.30	≤0.25
VSWR	1.25:1
Directional	20 dB
Power	200 W
Inter modulation	-140 dBc @ 2X43dBm
Connector	N-Female
Impedance	50Ω
Environment Conditions	IP64
Temperature	-35℃~+60℃
Weight	200g

Application of Cavity Couplers

Signal monitoring and tapping
Cavity couplers are often used to monitor RF signals in communication systems. For example, taking a portion of the signal for analysis or processing, which is referred to as signal tapping. By placing a coupler in line with the main signal path, engineers can extract a small portion, say 1% or 0.1%, of the signal without significantly affecting the strength or quality of the original transmission. This extracted portion can then be used for real-time monitoring, ensuring that the system is functioning correctly and troubleshooting issues as they arise.

Power distribution in antenna systems
Cavity couplers are essential in antenna systems, especially where power needs to be evenly distributed between two or more antennas. A typical example is a hybrid coupler that splits a single RF signal between two antennas. This is particularly useful in systems where both transmitting and receiving capabilities are required, like in aircraft or satellites. By using a coupler, engineers can ensure that the signal is evenly distributed, allowing both antennas to effectively carry out their functions.

Isolation between components
In complex communication systems, isolation between different components is very important to prevent one signal from interfering with another. Couplers provide this isolation by directing signals along specific paths. Take, for instance, a situation where a coupler is used to isolate a transmitter from a receiver. The coupler ensures that the power from the transmitted signal does not interfere with the received signal. Therefore, the receiver is able to pick up faint signals without the risk of being overwhelmed by the strength of the transmitter.

Measuring component performance
Cavity couplers are also used in telecommunications to measure the performance of different components. For instance, the power absorbed by the termination port on a coupler can be used to assess how much power a component like an amplifier or filter is using. Engineers can employ this information to evaluate efficiency, signal loss, and other important performance metrics. In addition, by incorporating couplers into testing setups, they gain invaluable insight into how various parts will behave under real-world operating conditions.

Packaging, Shipping and Payment

1.Use an anti-static bag to extract vacuum for sealing.
2.Use sponge or foam to protect the goods from collision.
3.Finally, use airplane carton to strengthen cargo protection.
The goods will be packed in carton which wrapped all by adhesive tape. In order to lower the freight cost, the volumn of the carton will be compressed without hurting the goods.

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FAQ

Q: What are the main types of cavity couplers?

A: The main types include loop - type couplers, probe - type couplers, and aperture - type couplers. Loop - type couplers use a small loop of wire to couple magnetic fields, probe - type couplers use a small probe to couple electric fields, and aperture - type couplers use an opening or aperture in the cavity wall for coupling.

Q: What is the difference between a weakly coupled and a strongly coupled cavity coupler?

A: A weakly coupled cavity coupler transfers a relatively small amount of power between the cavity and the external circuit. It has a small impact on the resonant behavior of the cavity. In contrast, a strongly coupled cavity coupler transfers a significant amount of power. A strongly coupled coupler can significantly modify the resonant properties of the cavity, such as the resonant frequency and the quality factor (Q - factor).

Q: Can cavity couplers be used in optical systems?

A: While the concept of cavity couplers is more commonly associated with microwave and RF systems, there are analogous devices in optical systems. In optical cavities, waveguide - to - cavity couplers are used to couple light in and out of the cavity. However, the physical mechanisms are based on the interaction of light with dielectric materials and waveguides rather than the electromagnetic fields in the microwave regime.

Q: How do you measure the performance of a cavity coupler?

A: The performance of a cavity coupler can be measured in terms of coupling efficiency, which can be determined by measuring the power transferred into or out of the cavity relative to the power available at the input of the coupler. The resonant frequency shift due to the coupler can also be measured. Additionally, the return loss (a measure of how much power is reflected back from the coupler) can be measured using a vector network analyzer.

Q: What materials are commonly used in cavity couplers?

A: In microwave cavity couplers, metals such as copper or aluminum are often used for the cavity walls and the coupling elements (e.g., loops or probes) due to their good electrical conductivity. For the dielectric material in the cavity (if any), materials like ceramics or certain plastics with appropriate dielectric properties are used.

Q: Can cavity couplers be cascaded?

A: Yes, cavity couplers can be cascaded in certain applications. However, when cascading, careful consideration must be given to impedance matching between the couplers and the cavities they are coupled to. If not properly matched, cumulative reflections can occur, leading to significant power losses and degraded performance.

We're professional cavity couplers manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to wholesale high-grade cavity couplers made in China here from our factory.

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