Device Overview

General Description

Available in either a connectorized or miniature surface mount package (0.240 inch x 0.150 inch), the DPX-1 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 dB with rejection typically exceeding 25 dB. Besides being ideal for transmitter/receiver applications, the DPX-1 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-1-1

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-1-2DiplexerDPX

RoHS

REACH

ReleasedEAR99
DPX-1-1DiplexerDPX

RoHS

REACH

ReleasedEAR99

Table Of Contents

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

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Port Configuration and Functions

Port Diagram

Diagram of the port configuration for DPX-1-1

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 © 2022 - 2026 Marki Microwave LLC.

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Specifications

Package Information

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

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

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Electrical Specifications

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

ParameterTest ConditionsMinimum
Frequency
(GHz)
Maximum
Frequency
(GHz)
MinTypMaxUnit
1 dBc High Passband -- -1.4-5GHz
1 dBc High Passband -- -1.4-5GHz
1 dBc Low Passband -- -0-0.85GHz
1 dBc Low Passband -- -0-0.85GHz
30 dBc Low Pass Rejection Point -- 0.62430-dB
30 dBc Low Pass Rejection Point -- 0.85-18-dB
Common Port Return Loss -- 0.85-20-dB
Common Port Return Loss -1.4 5-15-dB
Cross Over Frequency -1.1 1.1-5-%
High Pass Filter, Pass Band Insertion Loss -1.4 5-0.61.2dB
High Pass Filter, Pass Band Return Loss -1.4 5-15-dB
Isolation -- 0.751424-dB
Isolation -1.5 51424-dB
Low Pass Filter, Pass Band Insertion Loss -0 0.85-0.51dB
Low Pass Filter, Pass Band Return Loss -- 0.85-20-dB
Low Pass Filter, Stop Band Rejection -3.3 51822-dB
Low Pass Filter, Stop Band Rejection -1.4 3.3-18-dB
RF Power -- ---1W

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

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Typical Performance

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

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

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Mechanical Data

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