🔹 Description

The PIN Diode RF Limiter (10 MHz–6 GHz, SMA, 50 Ω) is a broadband passive device designed to protect sensitive RF equipment from overload, surges, and ESD events.
It automatically limits input power to safe levels without requiring external bias or control, making it ideal for LNA front-end protection, SDR receivers, spectrum analyzers, and laboratory setups.

Encased in a fully shielded metal housing, this limiter provides mechanical durability and EMI isolation while maintaining minimal insertion loss (<0.2 dB @1 GHz).
Operating across a wide frequency range from 10 MHz up to 6 GHz, it covers key communication bands — VHF, UHF, GPS (1.5 GHz), Wi-Fi (2.4 / 5 GHz), 5G (3.5 GHz), and X-band (5–6 GHz).

🔹 Technical Specifications

Parameter	Value
Frequency Range	10 MHz – 6 GHz
Impedance	50 Ω
Limiting Level	0 dBm
Max Input Power	20 dBm
Insertion Loss	<0.2 dB @1GHz, <3 dB @6GHz
Connector Type	SMA Female/Male
Housing Material	Aluminum Alloy (Shielded)
Dimensions	45 × 25 × 12 mm
Operating Mode	Passive, No Power Required
Working Temperature	−40°C to +85°C
Function	RF Power Limiter / Overload Protection

🔹 Key Features

• Frequency Range: 10 MHz – 6 GHz

• Impedance: 50 Ω

• Limit Power Level: 0 dBm typical

• Max Input Power: 20 dBm

• Insertion Loss:

  • <0.2 dB @1 GHz

  • <2.0 dB @1–3 GHz

  • <3.0 dB @3–6 GHz

• Connectors: SMA (female–male, standard 50 Ω interface)

• Dimensions: 45 × 25 × 12 mm (excluding connectors)

• Housing: Shielded metal case for RF isolation

• Type: Passive PIN-diode limiter, no external power required

• Operating Mode: Bidirectional RF protection

🔹 Main Functions

• Protects sensitive inputs of receivers, LNAs, and analyzers from high-level RF signals.

• Suppresses surges, pulses, and ESD without degrading signal integrity.

• Maintains linear performance under normal signal levels and clamps high amplitudes automatically.

• Reduces risk of overload in SDR and spectrum analysis equipment.

🔹 Applications

• Low-Noise Amplifiers (LNA) — input stage protection against strong signals.

• SDR Receivers & Spectrum Analyzers — prevents overload or front-end damage.

• Wi-Fi / 5G / GPS systems — maintains safe operation under variable input levels.

• VHF / UHF / Microwave receivers — suppresses out-of-band interference and spikes.

• Radar and telemetry equipment — limits transient pulse amplitudes.

• Laboratory RF measurement setups — universal front-end limiter for test benches.

🔹 Design Advantages

• Wideband 10 MHz–6 GHz operation for multi-system compatibility.

• Passive design – no DC bias or external power required.

• Shielded metal housing provides superior electromagnetic protection.

• Extremely low insertion loss ensures minimal signal degradation.

• Compact & lightweight form factor ideal for portable or embedded RF systems.

• Standard SMA connectors allow quick integration with any 50-ohm setup.