Device Overview

General Description

Available in either a connectorized or miniature surface mount package (0.240 inch x 0.150 inch), the DPX-3 is a low cost, high performance diplexer. The unique design offers high pass/low pass signal routing/multiplexing with excellent isolation. Passband insertion loss is less than 1.2 dB with rejection typically exceeding 25 dB. Besides being ideal for transmitter/receiver applications, the DPX-3 can also be used as an excellent non-reflective low pass (or high pass) filter for systems requiring broadband 50Ω impedance match (such as mixers).

Photo of DPX-3-1

Features

  • Low Insertion Loss
  • Superior Repeatability
  • Low Profile Miniaturized, Reflow Solderable Package Option
  • User defined cross over frequencies available

Applications

  • Reflectionless Filter Applications
  • RF Transceivers

Functional Block Diagram

Block Diagram

Part Ordering Options

Part NumberDescriptionPackageGreen StatusProduct LifecycleExport Classification
DPX-3-2DiplexerDPX

RoHS

REACH

ReleasedEAR99
DPX-3-1DiplexerDPX

RoHS

REACH

ReleasedEAR99

Table Of Contents

Revision History

Revision CodeRevision DateComment
-2012-11-29Datasheet Initial Release

Rev: - | Copyright © 2012 Marki Microwave LLC.

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Port Configuration and Functions

Port Diagram

Diagram of the port configuration for DPX-3-1

Port Functions

PortFunctionDescriptionDC Equivalent
Circuit
GNDGround DPX package ground is provided through the substrate and ground bond pads.Equivalent circuit for the Ground
Pin 1RF High Band Pin 1 is DC open to Pin 2 and Pin 3.Equivalent circuit for the RF High Band
Pin 2Common/Input Pin 2 is DC open to Pin 1 and short to Pin 3.Equivalent circuit for the Common/Input
Pin 3RF Low Band Pin 3 is DC open to Pin 1 and short to Pin 2.Equivalent circuit for the RF Low Band

Rev: - | Copyright © 2012 Marki Microwave LLC.

3

Specifications

Package Information

ParameterDetailsRating
Dimensions-3.81 x 6.10 mm
Moisture Sensitivity Level-MSL 3

Rev: - | Copyright © 2012 Marki Microwave LLC.

4

Electrical Specifications

Specifications guaranteed from -55 to +100°C, measured in a 50Ω system.

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
30 dBc Low Pass Rejection Point <1.5GHz
- 1.52530-dB
30 dBc Low Pass Rejection Point <2.3 GHz
- 2.3-15-dB
Common Port Return Loss <2.3GHz
- 2.3-15-dB
Common Port Return Loss 4.2-8 GHz
4.2 8-15-dB
Cross Over Frequency 3.1GHz
3.1 3.1-5-%
High Pass Filter, Pass Band Insertion Loss 4.2-8 GHz
4.2 8-0.71.4dB
High Pass Filter, Pass Band Return Loss 4.2-8 GHz
4.2 8-15-dB
Isolation <2.2GHz
- 2.21425-dB
Isolation 4.4-8 GHz
4.4 81425-dB
Low Pass Filter, Pass Band Insertion Loss DC-2.3 GHz
0 2.3-0.71.4dB
Low Pass Filter, Pass Band Return Loss <2.3GHz
- 2.3-15-dB
Low Pass Filter, Stop Band Rejection 4.2-4.8 GHz
4.2 4.8-15-dB
Low Pass Filter, Stop Band Rejection 4.8-8 GHz
4.8 81520-dB
RF Power -- ---1W
1 dBc High Passband -- -4.2-8GHz
1 dBc Low Passband -- -0-2.3GHz

Rev: - | Copyright © 2012 Marki Microwave LLC.

5

Typical Performance Plots

Insertion Loss (dB) graph for DPX-3-1
Return Loss (dB) graph for DPX-3-1
Isolation (dB) graph for DPX-3-1
Common Port Return Loss (dB) graph for DPX-3-1

Rev: - | Copyright © 2012 Marki Microwave LLC.

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Mechanical Data

Rev: - | Copyright © 2012 Marki Microwave LLC.

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Rev: - | Copyright © 2012 Marki Microwave LLC.

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