ISO/IEC 17025 Accredited · Trusted by Engineers Worldwide · Serving 11 Industries
+1 530-268-1860 contact@microprecision.com
ISO/IEC 17025 Accredited · Trusted by Engineers Worldwide · Serving 11 Industries
+1 530-268-1860 contact@microprecision.com
Browse used RF test accessories from Keysight, ETS-Lindgren, OML, MegaPhase, and Millitech — detectors, harmonic mixers, transient limiters, coaxial terminations, flex cables, loop antennas, and millimeter wave waveguide components. All units tested and verified. ISO/IEC 17025 accredited calibration available.
Image | Name | Brand | Condition | Frequency Range | Price |
|---|---|---|---|---|---|
 | The EMCO / ETS-Lindgren 6512 Shielded Loop Antenna offers accurate EMC testing from 9 kHz to 30 MHz—ideal for radiated emissions and immunity testing in lab environments. | EMCO / ETS-Lindgren | Used | 9 kHz – 30 MHz | $1,095.00 |
 | Keysight 11947A protects RF equipment from surges, 9 kHz–200 MHz range, <0.2 dB loss, 25 W max input. Ideal for EMI testing. | Keysight | Used | 9 kHz – 200 MHz | $595.00 |
 | Keysight 11970K Harmonic Mixer, 18–26.5 GHz, low loss, high isolation, ideal for precise frequency conversion in microwave applications. | Keysight | Used | 18 – 26.5 GHz | $75.00 |
 | Keysight 11974V WR15 RF Section supports 50–75 GHz testing with low loss, high stability, and precise pre-selection for mmWave signals. | Keysight | Used | 50 – 75 GHz | $2,295.00 |
 | Keysight 33330D detector, 10 MHz–33 GHz, planar-doped barrier, high sensitivity & wide dynamic range for microwave signal detection. | Keysight | Used | 10 MHz – 33 GHz | $375.00 |
 | Keysight 8473B measures microwave power from 10 MHz to 26.5 GHz with high sensitivity and thermoelectric cooling. | Keysight | Used | 10 MHz – 18 GHz | $275.00 |
 | Keysight 87421A Power Supply: 28 VDC, 10 A output, noise <5 mVrms, designed for 83xx and 87xx microwave amplifiers with overload protection. | Keysight | Used | $595.00 | |
 | Keysight 909C Coaxial Termination with 50 Ohm impedance, DC to 18 GHz frequency range, VSWR <1.15:1, N-Type male connector, and 2 Watts max power. | Keysight | Used | DC to 18 GHz | $150.00 |
 | Megaphase VN40 K1K1 18 flexible cable, 18 GHz to 40 GHz range, 2.92mm (k) connectors, low VSWR for reliable RF signal transmission. | MegaPhase | Used | 18 – 40 GHz | $695.00 |
 | Millitech MXP-12AO21L WR12 balanced mixer, 60–90 GHz, low LO drive, ideal for radar and communication systems. | Millitech | Used | 60 – 90 GHz | $995.00 |
| | OML S515MS-AG WR15 module extends Keysight E82XX7D PSG generators to millimeter waves, offering stable, precise RF signal generation. | OML | Used | 50 – 75 GHz | $3,995.00 |
Buying Guide
What each accessory type does, when you need it, and what specs to check.
A 50-ohm coaxial termination absorbs signal energy at the end of a transmission line, preventing reflections that distort measurements. Any unused instrument port should be properly terminated to maintain system impedance. The Keysight 909C covers DC to 18 GHz with VSWR under 1.25:1 and 2W power handling — a reliable bench accessory for any RF test setup.
RF detectors convert microwave signal power into a DC output voltage for measurement and detection. Schottky detectors like the 8473B offer fast response and wide dynamic range (–30 to +20 dBm) for general-purpose use. Planar-doped barrier detectors extend frequency coverage further — the 33330D reaches 33 GHz with a flat frequency response suited to wideband applications.
Harmonic mixers extend a spectrum analyzer's frequency range beyond its coaxial input limit using higher-order LO harmonics for down-conversion. The Keysight 11970K covers 18 to 26.5 GHz (K-band) — an essential microwave test accessory when characterizing signals above a standard analyzer's built-in range. Waveguide mixers like the Millitech MXP-12AO21L push coverage to 60–90 GHz for millimeter wave work.
High-quality 2.92mm flex cables maintain low insertion loss up to 40 GHz — critical for preserving signal integrity between instruments. Shielded loop antennas capture magnetic field components from 9 kHz to 30 MHz for EMC pre-compliance and radiated emissions testing. Transient limiters protect sensitive spectrum analyzers and EMI receivers from high-energy input spikes during conducted immunity tests.
All Micro Precision RF test accessories are sold tested and verified operational before shipment. ISO/IEC 17025 accredited calibration is available for applicable accessories including antennas, terminations, and detectors — providing documented measurement traceability required for aerospace, defense, EMC, and production test programs. Our A2LA-recognized laboratory issues calibration certificates meeting MIL-STD-45662 and ISO 9001 quality requirements, ensuring every component in your test accessory chain performs to specification.
FAQ
RF test accessories are ancillary components used alongside primary RF and microwave test instruments to extend capability, protect equipment, or complete a measurement setup. Common examples include coaxial terminations, RF detectors, harmonic mixers, transient limiters, flex cables, loop antennas, and waveguide components. They are essential for building complete, accurate, and safe RF measurement systems.
A 50-ohm RF termination absorbs signal energy at the end of a coaxial transmission line, preventing signal reflections that degrade measurement accuracy. It is used whenever an unused instrument port or cable end needs to be properly terminated to maintain system impedance. Without correct termination, reflected signals create standing waves that affect accuracy across the entire frequency range.
A harmonic mixer extends a spectrum analyzer beyond its built-in frequency range by using higher-order LO harmonics to down-convert high-frequency signals to the analyzer's IF input. The Keysight 11970K, for example, covers 18 to 26.5 GHz (K-band), enabling a standard analyzer to characterize signals in the microwave bands. Harmonic mixers are essential RF test accessories for engineers working in radar, satellite, and 5G frequency ranges.
A transient limiter protects sensitive RF test equipment — primarily spectrum analyzers and EMI receivers — from high-energy transient events on the input port. During conducted emissions or immunity testing, the device under test can generate voltage spikes that would damage the analyzer's input mixer. A transient limiter like the Keysight 11947A absorbs these spikes with less than 0.2 dB insertion loss, protecting the instrument without affecting measurement results.
Yes. Micro Precision Test Equipment offers ISO/IEC 17025 accredited calibration for applicable RF test accessories including antennas, terminations, and detectors. Our A2LA-recognized laboratory issues calibration certificates meeting traceability requirements for aerospace, defense, EMC, and production test programs. All used accessories are sold tested and verified operational, with calibration available at checkout or by request.