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
electronic warfare, military radios, and secure communication links
missile guidance, drones, and satellite payload systems
radar systems, avionics, and navigation equipment
Specification
Part numbers. | DC-727-5/6-N | DC-727-7/8-N | DC-727-10-N | DC-727-13/15-N | DC-727-20-N | DC-727-25-N |
Frequency(MHz) | 698-2700 |
Insertion Loss | ≦2.1/≦1.75 | ≦1.45/≦1.30 | ≦0.8 | ≦0.8/ ≦0.5 | ≦0.4 | ≦0.4 |
Coupling | 5/6 | 7/8 | 10 | 13/15 | 20 | 25 |
Accuracy | ±0.8/±0.8 | ±0.8/±0.8 | ±1.0 | ±1.0/ ±1.0 | ±1.2 | ±1.5 |
Isolation | ≧25/≧26 | ≧27/≧28 | ≧28 | ≧31/≧33 | ≧38 | ≧45 |
VSWR | ≦1.25 |
（PIM 3） | ≦-155dBc@2×43dBm |
Power | 200W |
Impedance | 50 ohm |
RF Connector | N-female |
Color | Black-plated |
Temperature | -20~+70 |
Application | Indoor or Outdoor, IP60 or IP65 |
Humidity | 5%-95% |
Weight(kg) | 0.23 |
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 “reverse polarity” (RP-SMA, RP-TNC)?
Reverse polarity means the gender of the center pin is swapped while keeping the outer body style unchanged. It was introduced to comply with regulatory requirements in Wi-Fi devices and to prevent connection with standard SMA/TNC.
What’s the lifespan of an RF connector?
Connector durability is rated in mating cycles: General-purpose connectors (BNC, SMA): 500 cycles. Precision connectors (2.92 mm, 2.4 mm): 500 cycles or less. Rugged telecom connectors (N, 7/16 DIN): 500 cycles.
Can RF connectors be reused?
Yes, but performance degrades with wear. Precision connectors (used in test equipment) should be handled carefully—damage to threads or pins increases VSWR and insertion loss.
What’s the difference between threaded, bayonet, and push-on RF connectors?
Threaded (SMA, N, TNC): Secure, vibration-resistant. Bayonet (BNC): Quick connect/disconnect. Push-on (MCX, SMP): Ultra-fast, compact, used in high-density modules.
