Device Overview

General Description

The CA-40 is a low loss directional coupler capable of operation to 40 GHz. This coupler features a unique air-line construction that simultaneously enables extremely low loss, minimal return loss, and outstanding directivity throughout the entire frequency range to 40 GHz. This coupler can be used for low loss and high power applications. The useable operating frequencies extend below 1 GHz for applications where calibration of the frequency response is available.

Photo of CA-40

Features

  • Low Insertion Loss and VSWR
  • Broadband Performance
  • High Directivity
  • Compact Size and Lightweight

Applications

N/A

Functional Block Diagram

Block Diagram

Part Ordering Options

Part NumberDescriptionConnectorsGreen StatusProduct LifecycleExport Classification
CA-40AIR-LINE DIRECTIONAL COUPLERStandard

REACH

RoHS

ReleasedEAR99

Table Of Contents

Rev: - | Copyright © 2022 - 2026 Marki Microwave LLC.

2

Specifications

Absolute Maximum Ratings

ParameterMaximum RatingUnit
RF Power Handling 20W

Package Information

ParameterDetailsRating
Weight-36g
Dimensions-30.48 x 30.48 mm

Rev: - | Copyright © 2022 - 2026 Marki Microwave LLC.

3

Electrical Specifications

Specifications guaranteed when operated in a 50Ω system.

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
Directivity -1 151824-dB
Directivity -15 401318-dB
Direct Line Insertion Loss DC to 20 GHz
- --0.30.6dB
Direct Line Insertion Loss -20 40-0.51dB
Mean Coupling -20 40322725dB
Mean Coupling -1 1-53-dB
VSWR -1 15-1.11.4
VSWR -15 40-1.31.6

Rev: - | Copyright © 2022 - 2026 Marki Microwave LLC.

4

Typical Performance

Direct line insertion loss graph for CA-40
Typical port return loss graph for CA-40
Coupled port power graph for CA-40
Typical directivity graph for CA-40

Rev: - | Copyright © 2022 - 2026 Marki Microwave LLC.

5

Mechanical Data

Rev: - | Copyright © 2022 - 2026 Marki Microwave LLC.

6