RF device manufacturing

RF devices are indispensable components in modern communication systems. They are responsible for the enlargedness, filtering, and hybrid of signals to ensure the quality and reliability of communication. RF amplifier and radio frequency filter are the two most common devices.

RF amplifier

RF amplifier is an electronic device used to amplify the radio frequency signal. It plays a vital role in the communication system, amplifying the weak radio frequency signal to sufficient power to perform subsequent processing or transmission.

Working principle: The bias voltage is applied to semiconductor devices to enlarge it. When the radio frequency signal is input, the current or voltage of the semiconductor device changes, thereby enlarging the signal.

Classification:

Power amplifier (PA): It is used to amplify the emission signal and requires large output power and good linearity.

Low noise amplifier (LNA): It is used to amplify the receiving signal, which requires low noise coefficients and stable gain.

application:

Communication system: mobile phone, base station, radar, etc.

Radio and television: radio launch machines, TV transmitters, etc.

Aerospace: satellite communication, radar system, etc.

RF filter

Radio frequency filter is an electronic device used to remove specific frequency signals. It plays a selective connection in the communication system to ensure the passage of the required signals and inhibit the interference signal.

Working principles: The combination of inductors, capacitors and other components constitutes a filter network to achieve attenuation or passing of different frequency signals.

Classification:

Low -pass filter: allow signals below the dead frequency.

High -pass filter: allows signals above the deadline to pass.

Tibetan filter: Allow a signal in a certain frequency band to pass.

Band resistance filter: suppress the signal of a certain frequency band.

application:

Communication system: It is used to select the signal of the required frequency band to suppress interference.

Radar system: It is used to remove miscellaneous waves and improve target detection capabilities.

Measurement instrument: for signal analysis and processing.

RF device manufacturing process

The manufacturing process of radio frequency devices is complicated and diverse, involving multiple disciplines such as material science, microelectronics, and electromagnetic field theory. Common manufacturing processes include:

Film technology: Through physical gas sedimentation (PVD), chemical gas deposition (CVD) and other methods, the thin film is deposited on the substrate to form various functional layers of the device.

Optical carvings: Use photoresal glue and light sources to erode tiny circuit patterns on the film.

Etcuding technology: Through chemical or physical methods, the unwanted part is removed to form the structure of the device.

Metalization: The metal layer is deposited on the device to form a conductive channel.

Packaging: Package the nude in a specific packaging body to protect the device and connect it to the external circuit.

The development trend

With the continuous development of communication technology, the demand for radio frequency devices is getting higher and higher. The future radio frequency devices will develop in the following directions:

Smallization: With the portability of mobile devices, the size of the radio frequency device will become smaller and smaller.

Integrated: Integrate multiple radio frequency devices to a chip to improve the integration and performance of the system.

High frequency: In order to meet the communication needs of higher frequency bands, the operating frequency of radio frequency devices will continue to increase.

Intelligence: By introducing artificial intelligence technology, adaptive and self -optimization of radio frequency devices.

Summarize

RF devices are the core of modern communication systems. Its manufacturing process is complicated and diverse, and the requirements for materials, processes and equipment are high. With the continuous progress of communication technology, radio frequency devices will play an increasingly important role in the future.