GL-130 Series Directional Coupler 136–174MHz 200W N-Female | 5–20dB Coupling

GL-130 series directional coupler for 136–174MHz VHF in-building systems. 200W average power, low VSWR, high isolation, N-female connectors. Available in 5/6/7/10/15/20dB coupling options.

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Product Overview

GL-130 Series - Directional Coupler for 136–174MHz networks, available in 5/6/7/10/15/20dB coupling options with N-female Connectors.

GL-130 series directional couplers are designed for indoor in-building solutions where stable RF sampling and signal distribution are required. The series covers 136–174MHz, supports up to 200W average power, features low VSWR (≤ 1.25), and provides high isolation performance across multiple coupling values.

Key Features

Wide Band 136–174MHz

Covers 136–174MHz for VHF in-building and coverage enhancement systems.

Multiple Coupling Options

Choose 5/6/7/10/15/20dB models to match monitoring level and system design.

Low VSWR & Insertion Loss

VSWR ≤ 1.25 with low insertion loss across the series to help protect link budget.

High Isolation

High isolation performance (up to ≥ 38dB depending on coupling value) for cleaner sampling.

200W Average Power

Supports up to 200W average power handling for demanding indoor RF distribution.

Indoor IP60 Housing

Indoor-rated enclosure and stable performance for in-building solutions (IP60).

Technical Specifications

System	Parameter	Specification
RF Performance	Frequency Range	136–174MHz
	Coupling (dB)	5 / 6 / 7 / 10 / 15 / 20 (by model)
	Insertion Loss (dB)	≤2.2 (5dB) / ≤1.9 (6dB) / ≤1.40 (7dB) / ≤1.0 (10dB) / ≤0.4 (15dB) / ≤0.3 (20dB)
	Coupling Accuracy (dB)	±1.2 (5/6/7/10dB) / ±1.3 (15dB) / ±1.4 (20dB)
	Isolation (dB)	≥24 (5dB) / ≥25 (6dB) / ≥26 (7dB) / ≥28 (10dB) / ≥34 (15dB) / ≥38 (20dB)
Interface & Power	VSWR	≤ 1.25
	Power Handling	200W (average)
	Impedance	50Ω
	Connector	N-female
	Model Options	GL-130-05-NF / GL-130-06-NF / GL-130-07-NF / GL-130-10-NF / GL-130-15-NF / GL-130-20-NF
Mechanical	Dimensions (L×W×H)	179 × 55 × 19mm
	Net Weight	0.28kg
	Color	Black
	Mounting	Mount via installation hole on coupler body (see installation instructions)
Environmental	Operating Temperature	-30℃ ~ +65℃
	Relative Humidity	5% ~ 95%
	Ingress Protection	Indoor IP60
	Grounding	Ensure proper grounding during installation and use
Compliance	Environmental Compliance	Not specified in provided documents

Applications

In-building solutions (VHF 136–174MHz) requiring signal sampling or distribution
Distributed Antenna Systems (DAS) and indoor coverage enhancement networks
RF test points for measurement, commissioning, and maintenance
Installations requiring N-female interfaces and 200W average power handling

GL-130 Series Directional Coupler 136–174MHz with N-Female Connectors (200W)

Directional Coupler Installed in Indoor DAS / In-building RF Distribution (136–174MHz)

Ordering Information

Request Quote Request Sample Download PDF

Test Reports & Installation Guide

Factory Test Results (Sample: January 29th, 2026)

MOQ

50 units

Lead Time

1-2 weeks

Warranty

1 year

Model	Frequency	Input VSWR	Output VSWR	Insertion Loss	Coupling Accuracy	Isolation	Result
GL-130-10 NF 10dB Directional Coupler	136–174MHz	1.17 (≤1.25)	1.18 (≤1.25)	0.68 dB (≤1.0)	9.2–10.9 dB (10±1.2)	31 dB (≥28)	PASS
GL-130-15 NF 15dB Directional Coupler	136–174MHz	1.15 (≤1.25)	1.17 (≤1.25)	0.26 dB (≤0.4)	14.3–15.8 dB (15±1.3)	36 dB (≥34)	PASS

Installation Instructions

⚠️

Application Precautions

Store in a dry environment at normal temperature
Handle carefully during transport; protect against rain and moisture
Clearly differentiate Input and Output ports — do not use Output port as Input (this will cause coupling port to affect signal output)
Ensure proper grounding during installation and use
Check all connectors before operation to prevent screw loosening
Do not operate in environments exceeding the rated 200W power

Mounting Procedure

1.Use the installation hole located on the cavity coupler body2.Determine installation position on mounting bracket; drill holes at specified location and secure expansion bolt sleeves3.Pass screw through cavity coupler (through installation holes), fix onto expansion bolt sleeve, and tighten firmly using Phillips screwdriver4.Connect signal from source port to Input Port; connect coupling port and Output Port to the feeder

Port 1

Input Port

Signal Source →

Coupling Port

Coupled Output

Sampling/Monitoring

Port 2

Output Port

→ To Antenna/Load

Documents & Downloads

Installation Manual (PDF)	Complete installation instructions with diagrams for cavity coupler mounting and port configuration.	Download
Test Report Template (Excel)	Factory test data format including VSWR, Insertion Loss, Isolation measurements for quality verification.	Request

FAQ

Q1: What coupling values are available in the GL-130 series?

The GL-130 series provides 5dB, 6dB, 7dB, 10dB, 15dB, and 20dB coupling options. Models include GL-130-05-NF, GL-130-06-NF, GL-130-07-NF, GL-130-10-NF, GL-130-15-NF, and GL-130-20-NF.

Q2: What frequency range and power rating does this directional coupler support?

The operating frequency range is 136–174MHz. The rated power is 200W (average).

Q3: What are the connector type and impedance?

The coupler uses N-female connectors and has a 50Ω impedance.

Q4: What should I注意 when installing and using the coupler?

Follow these key points: keep the unit dry during storage and transport; clearly distinguish Input/Output ports (do not use the Output port as Input); ensure proper grounding; check and tighten connectors; and do not operate above the rated power to avoid performance degradation.

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