Radar Detector PCBA

Unixplore Electronics Co., Ltd. is a China Radar Detector PCBA Manufacturer and Supplier. With advanced SMT/DIP production capabilities, professional RF engineering experience, and strict quality control, our Radar Detector PCBA Factory supports automotive and security applications with reliable performance, fast delivery, and customized manufacturing services.

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Product Description

Welcome to Unixplore Electronics Co., Ltd. Established in 2011, we are a premier one-stop turn-key Electronic Manufacturing Services (EMS) provider specializing in high-precision PCBA for the automotive and security sectors. With over 15 years of industry experience, an annual output of 1.5 million PCBAs, and a state-of-the-art 3,000 ㎡ industrial base, we deliver premium quality, faster delivery, and optimized costs for your radar detector projects.

Whether you are developing next-generation radar detectors for North American, European, or international markets, our expert engineering team and advanced SMT/DIP assembly lines ensure your RF and DSP designs are manufactured to the highest IPC-610E and ISO 9001:2015 standards.

Core Performance Parameters: Engineered for Precision

Before sourcing components, we ensure your baseline electrical and RF characteristics are perfectly defined and manufacturable.

Frequency Band Coverage

Band	Frequency Range	Typical Use	PCBA Requirement
X	10.50–10.55 GHz	Legacy radar	Low-noise amplifier (LNA) with <1.5 dB NF
K	24.05–24.25 GHz	Moving radar	Stable VCO, harmonic filtering
Ka	33.4–36.0 GHz	Photo radar	High-gain mixer, LO shielding
Ku	13.4–13.5 GHz	International traffic	Wideband IF amplifier

Sensitivity and Selectivity Metrics

Detection threshold: ≤ -115 dBm for K band

Image rejection ratio: >60 dB (mixer and pre-filter)

IF bandwidth: 100–300 MHz (adjustable via DSP settings)

Scanning speed: <100 ms per band (phase-locked loop settling time)

Environmental and Power Specifications

Parameter	Recommended Value	Reason
Operating voltage	11–14 V DC (reverse protection built-in)	Automotive power variation
Current draw	<350 mA at 12 V	Avoid overheating in dash enclosures
Temperature range	-20°C to +85°C	Summer dash and winter cold starts
Vibration tolerance	5 Grms, 10–500 Hz	Pothole and engine vibration

Key Components Selection: Field-Proven Reliability

Every component impacts false alert rates and reaction time. We assist in sourcing and assembling field-proven choices:

Low-Noise Amplifier (LNA)

Noise figure: < 1.0 dB at 24 GHz

Gain: > 22 dB

1 dB compression point: > 0 dBm (prevents intermodulation from nearby radar)

Package: QFN 3×3 mm or bare die for short lead inductance

Unixplore Note: We strictly avoid cheap SiGe LNAs that drift above 1.5 dB noise figure after thermal cycling.

Mixer and Local Oscillator (LO)

Fundamental mixer (passive diode ring): Conversion loss < 8 dB; Requires LO drive at +10 dBm.

Active double-balanced mixer (GaAs HBT): Conversion gain: -2 dB to +3 dB; LO input: 0 dBm. Better for dense PCBA layouts.

PLL Synthesizer: e.g., ADF41513 with phase noise < -95 dBc/Hz at 10 kHz offset for Ka band.

IF Amplifier and Filter Chain

Stage	Component	Spec	Purpose
1st IF	Variable gain amp (VGA)	20 dB range, 2.5 dB NF	Overload protection
Bandpass	SAW filter	Center 110 MHz, BW 40 MHz	K/Ka separation
2nd IF	Limiting amp	70 dB gain, RSSI output	Signal strength to ADC

Critical Assembly Note: Our technicians place SAW filters after the VGA to prevent saturation from strong door opener signals.

Digital Processing Unit (DSP/MCU)

ADC resolution: 12-bit minimum at 50 MSPS

FFT bins: 1024 points for 300 MHz IF bandwidth

Peripheral I/O: I2C for EEPROM, UART for user interface, GPIO for LED/buzzer.

Recommended: STM32H7 series (dual-issue, 480 MHz) or STM32F4 with external FFT accelerator.

Power Management

Automotive radar PCBA demands robust power rails:

Rail	Voltage	Current	Component
Analog (LNA, mixer)	3.3 V	150 mA	LDO with 50 µVrms noise
Digital (MCU, ADC)	3.3 V	200 mA	DC-DC + ferrite bead
LO/PLL	5 V	80 mA	LDO with PSRR > 70 dB at 1 kHz
Reverse protection	-	-	Schottky + TVS (24 V clamp)

Unixplore Testing: We measure inrush current during functional testing to prevent fuse rating failures caused by bulk decoupling caps.

Advanced Layout and Shielding Capabilities

Premium components fail on a poor board. Our 20+ R&D engineers and advanced SMT lines ensure flawless execution:

RF Traces: Stripline vs microstrip on top layer; grounded coplanar waveguide for Ka band.

Via Fences: Spacing < λ/20 at 36 GHz (~0.4 mm) around LO traces.

Ground Planes: Dedicated RF ground plane with no splits under LNA or mixer.

Shielding: Two-piece snap-down shielding cans over LO and IF sections for rework access.

Assembly Precision: High-Speed Yamaha SMT machines and specialized stencil designs for 0201 passives under RF cans.

Rigorous Testing and Validation

Backed by 2 aging test rooms, 2 high & low temperature test rooms, and state-of-the-art in-house testing instruments, we verify six critical points before shipping:

Noise floor: LNA input terminated; < -110 dBm (RMS)

Spurious LO harmonics: No spike > -70 dBc at 2×LO frequency

Thermal drift: Frequency error < ±2 MHz from -20°C to +70°C

Intermodulation: Two −40 dBm tones spaced 10 MHz apart; IM3 < -85 dBc

Recovery time: After 10 ms of +10 dBm overload; < 500 µs to normal detection

False alert rate: Urban environment simulation; ≤ 2 per hour (using recorded drive test)

Expert FAQ: Solving Common Radar PCBA Challenges

Q1: What is the most common failure mode and how do you prevent it? A: LNA burnout from continuous high-power radar sources. We prevent this by integrating a fast-acting PIN diode limiter before the LNA (threshold at +3 dBm, reaction < 10 ns). We also embed temperature sensors on the LNA ground paddle, allowing the MCU to reduce gain or shut down the RF path if the die exceeds 85°C. Every production board passes a 1-watt continuous injection test at the antenna port for 2 minutes without permanent gain degradation.

Q2: How does PCBA component choice affect false alert filtering? A: Three factors dominate:

IF SAW filter bandwidth: A 40 MHz bandwidth passes valid radar pulses and rejects 5G cellular interference.
ADC resolution: 12 bits allows 60 dB dynamic range; 10 bits loses weak signals near the noise floor.
Clock reference accuracy: A ±25 ppm TCXO ensures FFT bins align with actual radar frequencies. We assemble dual-core MCUs to run real-time FFT and pattern recognition simultaneously.

Q3: Can the same PCBA design be reused for different regional radar bands (EU vs USA)? A: Yes. We implement three mandatory changes:

Input filter: Switchable band-pass filter network (PIN diode/MEMS) for K/Ka (USA) or Ku/K (EU).
LO frequency plan: Programmed PLL synthesizer covering 10.5 GHz, 13.4 GHz, or 24.15 GHz with an octave tuning VCO core.
Calibration constants: Per-band LNA bias and mixer conversion loss stored in EEPROM, read via DIP switch or GPS geofencing at boot.

Why Choose Unixplore Electronics for Your Radar Detector PCBA?

One-Stop Turn-Key Service: From PCB design, parts procurement, SMT & DIP assembly, programming, functional testing, conformal coating, box building, to finished product assembly and packaging.

No MOQ & Fast Turnaround: We accept small quantities with no minimum order requirement. Sampling in 24 hours to 7 days; Mass run in 10-30 days.

Automotive & Security Expertise: ISO 9001:2015 and IPC-610E Class II certified. All components rated for -40°C to +105°C (automotive grade).

Global Reach: Exporting to North America (20%), Western Europe (35%), Oceania (20%), and beyond. Fluent English, French, Russian, and Arabic sales teams ready to support you.

Cost & Risk Optimization: Best quality, faster delivery, lower cost, and zero risk.

Ready to Start Your Project?

Choosing components for a radar detector PCBA is about matching noise figure, intercept points, and thermal drift to real driving environments. Start with your frequency plan, and let Unixplore build around your LNA and IF filter chain.

Send us your Gerber files and BOM list today, and receive a customized quotation within 24 hours!

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