Overview
An RF coupler (commonly called a directional coupler) is a passive device that samples or combines RF signals while maintaining controlled signal direction and minimal disturbance to the main transmission line. It provides a way to monitor, measure, or inject signals without interrupting system operation.
Features
Coupling Factor: Defines how much of the input signal is sampled (e.g., 3 dB, 6 dB, 10 dB, 20 dB).
Frequency Range: Available for use from kHz to over 100 GHz, depending on design.
Low Insertion Loss: Minimizes signal loss in the through line
Types: Directional couplers, hybrid couplers (90° and 180°), and dual-directional couplers.
Applications
Monitoring signal power without disturbing the main line
Measuring reflected power (VSWR) for antenna systems
Combining or distributing signals in communication networks
Signal sampling for test and measurement setups
in-vehicle infotainment and connectivity systems
railway communications and signaling systems
vehicle radar (24 GHz, 77 GHz for ADAS)
Specification
Model No. | SZHC-727-NF-3dB-2/2 |
Frequency (MHz) | 698-2700 |
Insertion Loss | ≦0.65 |
Coupling | 3.0 |
Isolation(dB) | ≧23 |
VSWR | ≦1.25 |
PIM | ≦-155dBc@2*43dBm |
Power | 200W |
Impedance | 50 ohm |
RF Connector | N-female |
Color | Black-plated |
Application | Indoor or Outdoor, IP60 or IP65 |
Temperature | -20~+70 |
Humidity | 5%-95% |
Weight(kg) | 0.45 (Type N) |
FAQ
Sample Delivery Time
Regular models require 15 days, while some complex connectors require 25 days.
Sample Fee
Most RF connectors are CNC-machined parts and do not require mold-making.
However, each part needs to be fine-tuned on the CNC machine. Typically, a single sample costs $200.
This fee will be refunded after a 5K bulk order.
Guarantee
Brass RF connectors come with a one-year warranty.
Stainless steel connectors come with a three-year warranty.
The lifespan also depends on the contact material beryllium contacts offer better durability.
ROHS & REACH Compliance
Our products fully comply with ROHS & REACH regulations.
Does LENORF Offer Military-Grade Products?
Yes. We are honored to provide military-grade products with exceptionally stable quality.
MOQ (Minimum Order Quantity)
Regular connectors: 500 PCS
Adapters: 100 PCS
Military connectors: 100 PCS
Materials
Common materials include:
Body: Brass, stainless steel
Insulator: PTFE, PEEK
Contacts: Brass, phosphor bronze, beryllium copper
Other: Aluminum, titanium alloy
What is impedance, and why is 50 Ω or 75 Ω important?
Impedance matching prevents signal reflection and power loss. 50 Ω: Standard for RF communication, test equipment, aerospace, defense. 75 Ω: Standard for broadcast, video, and cable TV applications.
What materials are RF connectors made of?
Body: Brass, stainless steel, or beryllium copper (with nickel, gold, or silver plating). Insulator: PTFE, PE, or advanced low-loss dielectrics. Contacts: Gold-plated brass or beryllium copper for low resistance and durability.
Are RF connectors weatherproof?
Some RF connectors are designed with gaskets and sealing (e.g., N-type, 4.3-10) for outdoor telecom, antennas, and harsh environments. Indoor lab connectors (e.g., SMA, BNC) are usually not weatherproof unless specified.
What’s the difference between male and female RF connectors?
Male: Has a center pin and usually an outer thread or bayonet. Female: Has a receptacle (socket) for the center pin and matching thread. Some connectors (like SMA) can be confusing because “reverse polarity” (RP-SMA) swaps pin/socket configuration.
