1–40 GHz Wideband Microwave Tuners | Phase-Synchronous Downconverter Arrays

Designed for millimeter-wave signal processing, spectrum downconversion, wireless testbeds, and multi-channel coherent direction-finding (DF) applications, this family of wideband microwave tuners delivers multi-octave coverage across 1–18 GHz and 18–40 GHz bands. Purpose-built for spectrum monitoring, microwave measurement, satellite testing, and specialized intelligence receiver applications, these modules transform high-frequency microwave and millimeter-wave spectrum down to standardized intermediate frequencies (IF).

By sharing an internal ultra-stable Local Oscillator (LO) across coherent channels, our phase-synchronous receiver array architectures are designed to minimize channel-to-channel phase drift, achieving measured channel-to-channel phase tracking variation below ±0.5° under defined laboratory test conditions, significantly reducing phase calibration complexity in interferometer and beamforming receiver arrays.

Procurement & Quality Commitments

• Factory RF Verification: Each unit undergoes RF performance verification including frequency response, gain, output spectrum, and key RF parameters using high-performance spectrum analyzers such as Keysight PXA-class instruments. Printed test curves and swept Touchstone .s2p files are included with every shipped module.
• Coherent Phase Tracking: Shared LO distribution reduces differential thermal-induced phase variation between channels, maintaining phase tracking stability below ±0.5° under laboratory conditions.
• 1-Unit Prototype MOQ: Custom frequency band layouts and 4-channel expansions delivered in 3–4 weeks with a 1-unit minimum order quantity.
• Hardened Module Packaging: CNC-machined aluminum enclosures secured in anti-static foam and sealed inside 5-layer export cartons.

1. Quick Specification Matrix & Selection Guide

To assist RF system integrators, test engineers, and receiver designers in selecting the correct hardware architecture, the matrix below outlines core RF, IF, gain, phase, and interface specifications across our single-channel and dual-channel downconverter product lines:

Technical Parameter	1–18 GHz Wideband Tuner	1–18 GHz Dual-Channel Phase-Synchronous Array	18–40 GHz Dual-Channel Ka-Band Downconverter
SKU / Model Number	0118G-1G-600M	0118G-1G-600M-2CH	1840G-1G-1G-2CH
RF Input Frequency Range	1 – 18 GHz	1 – 18 GHz	18 – 40 GHz
IF Output Frequency Range	1.0 – 1.2 GHz	1.0 – 1.2 GHz	1.0 – 2.0 GHz
Instantaneous IF Bandwidth	500 / 700 MHz	500 / 700 MHz	1000 MHz (within 1.0–2.0 GHz IF range)
Number of Coherent Channels	1 Channel	2 Channels (Coherent Shared LO)	2 Channels (Coherent Shared LO)
Power Gain	50 – 60 dB	55 dB	55 dB
Noise Figure	20 dB (Max)	8 – 10 dB (Integrated Low-Noise Front-End)	20 – 22 dB
Input 1dB Compression (P1dB)	-20 dBm	-20 dBm	-20 dBm
Tuning Resolution	Down to 1 MHz	Down to 1 MHz	Down to 1 MHz
Spurious Suppression	In-Band Filtered	50 dBc	50 dBc (CNC Wall Shielded)
RF Connector Type (In / Out)	SMA Female / SMA Female	SMA Female / SMA Female	2.92mm Female / SMA Female

2. Hardware Architecture & Integration Considerations

Field integration of high-gain downconverters into spectrum monitoring and signal processing systems requires accounting for signal power thresholds, LO distribution mechanics, and cavity radiation.

1–18 GHz Single-Channel Wideband Tuner (0118G-1G-600M)

High-linearity single-channel downconversion hardware precision-optimized for multi-octave automated spectrum monitoring links requiring stable power gain and minimized in-band intermodulation distortion.

Integration Considerations: Designed for continuous coverage across the 1–18 GHz passband with fine 1 MHz tuning resolution. Note the maximum recommended RF input level of +3 dBm—cascade an external RF limiter if operating in close physical proximity to high-power radar transmitters or high-level signal generators to protect front-end LNAs.

1–18 GHz Dual-Channel Phase-Synchronous Array (0118G-1G-600M-2CH)

Coherent dual-channel wideband tuner featuring an ultra-low-noise receiver architecture and precision-matched phase tracking, optimized for multi-channel interferometer arrays and direction-finding systems.

Integration Considerations: Designed for dual-channel spectrum monitoring with phase tracking variation staying below ±0.5° under defined laboratory test conditions. To maximize system sensitivity, the dual-channel model integrates an optimized low-noise front-end LNA architecture to achieve an 8–10 dB Noise Figure (compared to unamplified single-channel tuners). This system splits a single ultra-stable internal LO to drive both channels coherently. If your application requires a 4-channel receiver array or a modified 1.5–18 GHz passband, custom filter re-layouts are completed in 21 days.

18–40 GHz Dual-Channel Ka-Band Downconverter (1840G-1G-1G-2CH)

High-frequency millimeter-wave dual-channel downconverter equipped with an expansive 1000 MHz instantaneous IF bandwidth, purpose-built for Ka-band satellite signal simulation and wideband signal analysis.

Integration Considerations: At 40 GHz millimeter-wave frequencies, internal cavity radiation leakage can severely degrade spurious rejection. We utilize CNC-milled internal shielding walls to isolate channels, maintaining spurious rejection at ≥50 dBc. Operational Warning: An external finned heatsink or cold plate is mandatory for continuous 24/7 duty cycles.

3. Target Deployment Scenarios & System Integration

Deploying a multi-channel coherent downconverter provides system-level advantages across commercial test equipment, satellite communications, and specialized measurement platforms:

• Spectrum Monitoring & Microwave Measurement: Multi-octave 1–18 GHz tuning allows monitoring receivers to continuously sweep radar and communications emitters without RF band-switching gaps.
• Phase-Interferometer Direction Finding: Dual-channel phase matching (<±0.5° variation) enables precise angle-of-arrival (AoA) estimation in airborne, naval, and ground-based antenna arrays.
• Ka-Band Satellite Signal Simulation: 18–40 GHz downconversion with 1000 MHz instantaneous bandwidth supports high-throughput satellite (HTS) transponder testbeds and modem validation.
• Wireless Testbeds & Semiconductor Characterization: High power gain (50–60 dB) amplifies weak over-the-air signals prior to digitizer sampling, improving overall test system receiver sensitivity.

4. Custom Layouts & Prototyping Capabilities

Integrating custom tuner modules into specialized chassis constraints or expanding channel counts requires fast-turn factory modification:

• Custom Frequency Passbands: Need modified sub-bands such as 0.5–18 GHz, 2–20 GHz, or 26.5–40 GHz? Our microwave design team executes custom microstrip filter re-layouts in 21 days.
• Multi-Channel Scalability: Standard 2-channel designs can be scaled to 4-channel or 8-channel phase-coherent architectures sharing a common LO distribution network.
• 1-Unit Prototype Support: We support radar prototype builds, receiver upgrades, and lab testbed evaluations with a 1-unit minimum order quantity and 3–4 week production turnarounds.

Explore our full range of wideband microwave tuners and custom downconverter modules to evaluate engineering prototypes on your bench.

Frequently Asked Questions

Q1: How does a shared Local Oscillator (LO) help maintain phase tracking stability below ±0.5° in dual-channel tuners?

By splitting a single ultra-stable internal LO source through a symmetrical internal distribution network to drive both channel mixers simultaneously, the system reduces differential thermal-induced phase variation between channels. This keeps measured phase tracking variation below ±0.5° under defined laboratory test conditions.

Q2: What damage protection measures should be taken at the RF input interface?

The 1–18 GHz wideband tuners feature a maximum recommended RF input level of +3 dBm. When operating near high-power RF sources—such as radar transmitters or high-power amplifiers—an external fast-actuator RF limiter should be cascaded at the SMA input interface to prevent LNA overload or burnout.

Q3: Why is internal CNC cavity shielding required for 18–40 GHz downconverters?

At millimeter-wave frequencies up to 40 GHz, parasitic cavity resonance and inter-channel RF radiation leakage can bypass internal microstrip filters. CNC-milled internal isolation walls create physically isolated shielded cavities for each channel, maintaining spurious rejection levels at ≥50 dBc.