QMA Attenuator
QMA Attenuators are precision RF and microwave components designed to reduce RF signal power while maintaining excellent impedance matching and signal integrity. Featuring the quick-lock QMA connector interface, these attenuators offer faster installation than threaded SMA connectors while delivering reliable electrical performance. They are widely used in wireless communication, telecom infrastructure, aerospace, defense, RF testing, distributed antenna systems (DAS), 4G/5G networks, radar systems, and industrial RF applications. Supporting frequencies from DC up to 18 GHz, QMA Attenuators provide low VSWR, excellent return loss, and accurate attenuation for demanding RF systems.
At SRFS Teleinfra, we manufacture premium-quality QMA Attenuators using precision resistive networks, high-quality QMA connectors, and advanced CNC machining technology. Our attenuators are engineered to deliver stable attenuation, low insertion loss, excellent mechanical durability, and long service life for high-frequency RF and microwave applications.
All our QMA Attenuators are manufactured in India under stringent quality control procedures using premium raw materials and precision manufacturing processes. Every attenuator undergoes comprehensive electrical and mechanical testing to ensure consistent attenuation accuracy and dependable RF performance.
What is a QMA Attenuator?
A QMA Attenuator is a passive RF component that reduces the power level of an RF signal by a fixed attenuation value while maintaining a constant 50 Ohm impedance. It protects sensitive RF equipment from excessive signal levels, improves measurement accuracy, and minimizes signal reflections.
Unlike threaded SMA connectors, the QMA interface uses a quick-lock coupling mechanism, allowing faster installation and removal while maintaining excellent electrical performance and mechanical reliability. This makes QMA Attenuators ideal for applications requiring frequent connection and disconnection.
Technical Specifications
Our QMA Attenuators are engineered to meet demanding RF and microwave performance requirements.
Impedance
Standard 50 Ohm impedance for accurate impedance matching.
Frequency Range
Supports frequencies from DC to 18 GHz depending on the model.
Attenuation Values
Available in:
- 1 dB
- 2 dB
- 3 dB
- 5 dB
- 6 dB
- 10 dB
- 15 dB
- 20 dB
- 30 dB
- 40 dB
- 50 dB
- 60 dB
- Custom Values
Power Rating
Available from 1 Watt to 100 Watts depending on application requirements.
VSWR
Low VSWR for excellent return loss and highly accurate RF measurements.
Connector Interface
Precision QMA Male and Female connectors with quick-lock coupling.
Materials
Manufactured using stainless steel, brass, gold-plated beryllium copper contacts, PTFE dielectric, and precision thin-film resistor technology.
Compliance
Manufactured according to international RF and microwave quality standards.
Applications of QMA Attenuators
Our QMA Attenuators are widely used in:
- Telecom base stations
- 4G & 5G infrastructure
- Distributed Antenna Systems (DAS)
- RF laboratories
- Vector Network Analyzer (VNA) calibration
- RF production testing
- Aerospace communication
- Defense electronics
- Satellite communication
- Radar systems
- Test & measurement equipment
- Industrial wireless communication
- Microwave communication
- Research & Development laboratories
- Wireless network optimization
Key Performance Features
Selecting the right QMA Attenuator ensures dependable RF signal control and microwave performance.
- Precision 50 Ohm impedance
- Frequency support up to 18 GHz
- Quick-lock QMA connector
- Accurate attenuation values
- Low insertion loss
- Low VSWR
- Excellent return loss
- Multiple power ratings
- Compact design
- High mechanical durability
- Precision CNC machining
- Long operational life
High-quality QMA Attenuators improve RF system reliability, protect sensitive equipment, reduce signal reflections, and provide precise RF signal conditioning for telecom, aerospace, defense, satellite communication, and industrial microwave applications.
Product Specifications
| Product Type | Impedance | Frequency Range | Application |
|---|---|---|---|
| QMA Fixed Attenuator | 50 Ohm | DC to 18 GHz | RF Signal Attenuation |
| QMA Precision Attenuator | 50 Ohm | DC to 18 GHz | Vector Network Analyzer (VNA) |
| QMA Low Power Attenuator | 50 Ohm | DC to 18 GHz | Laboratory RF Measurements |
| QMA High Power Attenuator | 50 Ohm | DC to 18 GHz | High Power RF Systems |
| QMA Male to Female Attenuator | 50 Ohm | DC to 18 GHz | RF Test Equipment |
| QMA 3 dB Attenuator | 50 Ohm | DC to 18 GHz | Signal Level Control |
| QMA 10 dB Attenuator | 50 Ohm | DC to 18 GHz | Microwave Communication |
| QMA 20 dB Attenuator | 50 Ohm | DC to 18 GHz | RF Calibration |
| QMA 30 dB Attenuator | 50 Ohm | DC to 18 GHz | RF Production Testing |
| QMA Precision RF Attenuator | 50 Ohm | DC to 18 GHz | Telecom & Defense Systems |
Why Choose us
Precision RF Engineering
Our QMA Attenuators are manufactured to deliver highly accurate attenuation, low insertion loss, and outstanding RF performance.
Low VSWR & Excellent Return Loss
Designed to minimize signal reflections and maximize RF transmission efficiency across the operating frequency range.
Quick-Lock QMA Interface
The QMA connector provides fast installation and secure connections without threaded coupling, improving efficiency in RF system assembly and maintenance.
Manufactured in India
All our QMA Attenuators are manufactured in India using premium materials, advanced CNC machining, and stringent quality control procedures to ensure reliable RF performance and long service life.
Frequently Asked Questions
A QMA Attenuator is a passive RF device that reduces RF signal power while maintaining a constant 50 Ohm impedance.
Most precision QMA Attenuators support frequencies from DC to 18 GHz.
Standard attenuation values include 1 dB, 2 dB, 3 dB, 5 dB, 6 dB, 10 dB, 20 dB, 30 dB, 40 dB, 50 dB, and 60 dB.
The QMA connector features a quick-lock coupling mechanism that enables faster installation and removal while maintaining excellent RF performance.
Standard 50 Ohm impedance for precise RF and microwave applications.
They are widely used in telecom infrastructure, RF testing, aerospace, defense, DAS systems, 4G/5G networks, and wireless communication.
We manufacture QMA Attenuators with power ratings from 1 Watt to 100 Watts, depending on application requirements.
Yes. SRFS Teleinfra manufactures customized QMA Attenuators with specific attenuation values, connector configurations, frequency ranges, and power ratings.
Yes. All our QMA Attenuators are manufactured in India using premium materials, precision engineering, and comprehensive quality testing.
SRFS Teleinfra offers precision-engineered QMA Attenuators with excellent RF performance, customized solutions, stringent quality control, competitive pricing, fast delivery, and expert technical support.