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About Keylink

Founded in 2002, KeyLink Microwave has been devoted to manufacturing RF and microwave power amplifier modules & subsystems and other RF components. With its own 56,500 square feet manufacturing base in Chengdu, China, KeyLink provides the most stable ready-to-ship COTs RF amplifiers and the most technologically advanced OEM solutions for radar, jamming, communication system, test and measurement, and other commercial and industrial markets. Our powerful production facility and ISO 9001 management system ensure fast lead time, competitive cost and good performance. Operating globally with annual 30% growth, KeyLink has been the preferred supplier in the worldwide RF power amplifier industry.

To better serve overseas market, Keylink Microwave set up a wholly-owned subsidiary Keylink Wireless in 2019 in the same building.

R & D Team

1) Talented team consisting of 60 engineers
2) Chief engineers with 20+ years' experience in designing RF/MW SSPA
3) Design with state-of-the-art GaN, GaAs, LDMOS and bipolar device technologies

R&D has always been put into a strategic position by Keylink.

In order to apply the latest technologies to products, Keylink maintains and upgrades all R&D hardware and software facilities annually. We encourage and support the further education of our employees and have carried out a plan for talents development. We also send engineers to communicate with domestic and foreign universities, research institutes, etc. Meanwhile, every year we participate in various large microwave exhibitions such as IMS, EuMW, etc.

In design stage, lots of CAD tools are used by us, for instance, electromagnetic simulation software, thermal simulation software, structural simulation software.

Keylink's high power combiners can reach over 90% efficiency and 100kW combined power. Keylink's digital pre-distortion platform and RF pre­distortion technology can greatly improve communication quality, allowing power amplifiers to maintain over 35% efficiency with EVM characteristics less than 2% at 40MHz signal bandwidth. MCM technology and the selection of high-efficiency GaN components have also improved our miniaturization technology.

About Keylink


All our products are with 1-3 years' warranty accordingly. Services are always available even the items are out of warranty status.

Any item requiring service, just contact our service department at for a Return Material Authorization (RMA) number.

Keylink Quality Assurance

Commitment to High Quality

Strong QC Team

Keylink has a professional QC team of 30 technicians to guarantee our reputation and high performance of solid state power amplifiers.

Strict Inspection

We perform 100% visual/mechanical/electrical inspection on all incoming materials. Vendors and materials are continuously evaluated to ensure compliance to set quality standards. During and after production , strict inspection is also executed. Every data on our ATR is verified by QC technicians.

Traceable Production

A production tracking system has been designed to ensure traceability of relevant data for each item. The full process tracking record, which perfectly fits with the supply chain management system, enables more support for goods control and improves overall product quality and management efficiency.


Keylink Microwave is an ISO 9001: 2015 certified manufacturer. All stages of our designing, manufacturing and inspection work are implemented strictly on ISO 9001 quality system standard to assure you more consistent and reliable products.

We are also an eco-friendly RF Power Amplifier manufacturer with ISO 14001 as our conduct basis.

All our RF power amplifier and microwave components have passed the CE certificate.

Keylink ISO Certification
ISO Certification
Keylink CE Certification
CE Certification
Keylink RoHS Certification
RoHS Certification
Keylink IQnet and CQC
IQnet and CQC

Company Culture


Honesty and Win-Win Cooperation


To supply application-oriented RF amplifiers


Being the most professional supplier of microwave and RF products


A global leader in the area of microwave and RF applications