Triangle Microwave CO -253, Directional Coupler SMA, Freq. 0.25-0.50 GHz.

Product Description

Triangle Microwave (KDI) Model CO-253 Directional Coupler – 0.25–0.50 GHz, SMA

This used Triangle Microwave CO-253 is a precision stripline directional coupler designed for high-performance RF and microwave applications. It is part of the Series CO family, known for its rugged construction, high directivity, and low VSWR, ensuring reliable performance under severe environmental conditions . This model is specifically configured for the 250-500 MHz frequency range.

Key Features & Specifications

Based on the original KDI/Triangle Electronics datasheet, the CO-253 offers the following performance characteristics :

Note 1: Power ratings apply when the main line is terminated in a 1.75 maximum VSWR .
Note 2: A 50-ohm termination (1.0 watt at +25°C) is typically supplied with the unit .

Condition

SOLD AS IS
USED – SHOWS NORMAL BENCH WEAR (scuffs, minor marks)
SMA CONNECTORS: INSPECT FOR CENTER PIN WEAR AND THREAD DAMAGE [Specify condition] RF PERFORMANCE NOT VERIFIED
MAY OR MAY NOT INCLUDE THE ORIGINAL 50-OHM SMA TERMINATION [Check unit/inventory] PICTURE MAY NOT MATCH PRODUCT

Applications

Directional couplers are essential components for RF and microwave test and design. The CO-253 is ideal for:

• Power Sampling: Monitoring forward and reflected power without disturbing the main signal path.

• Network Analysis: Used in test setups for measuring return loss and gain.

• Amplifier Linearization: Feedback loops in feedforward and predistortion systems.

• Signal Injection and Detection: Adding or sampling signals in communication systems.