Device Overview

General Description

Available in either a connectorized or miniature surface mount package (0.240 inch x 0.150 inch), the DPX-M50 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-M50 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 DPXN-M50

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 NumberDescriptionPackageConnectorsGreen StatusProduct LifecycleExport Classification
DPXN-M50DiplexerDPXNStandardConsult FactoryReleasedEAR99

Table Of Contents

Revision History

Revision CodeRevision DateComment
-2013-01-01Datasheet initial Release
A2019-10-01Maximum DC Voltage Rating Added

Rev: A | Copyright © 2013, 2019 Marki Microwave LLC.

2

Port Configuration and Functions

Port Diagram

Diagram of the port configuration for DPXN-M50

Port Functions

PortFunctionConnector TypeDescriptionDC Equivalent
Circuit
GNDGround -DPXN package ground path is provided through the metal housing and outer coax conductor.Equivalent circuit for the Ground
Port 1RF High Band -Port 1 is DC open to Port 2 and Port 3.Equivalent circuit for the RF High Band
Port 2Common/Input -Port 2 is DC open to Port 1 and short to Port 3.Equivalent circuit for the Common/Input
Port 3RF Low Band -Port 3 is DC open to Port 1 and short to Port 2.Equivalent circuit for the RF Low Band

Rev: A | Copyright © 2013, 2019 Marki Microwave LLC.

3

Specifications

Package Information

ParameterDetailsRating
ESDThis device is not sensitive to ESD.N/A
Dimensions-11.94 x 11.94 mm

Rev: A | Copyright © 2013, 2019 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
1 dBc High Passband 1Temp = 25°C
- -0.07--GHz
3 dBc High Passband 2Temp = 25°C
- -0.05--GHz
30 dBc High Pass Rejection Point 3Temp = 25°C
- -0.02--GHz
High Passband Return Loss 4Temp = 25°C
- --20-dB
High Pass Isolation 5Temp = 25°C
- --30-dB
High Pass Group Delay 6Temp = 25°C
- --80-ps
1 dBc Low Passband 7Temp = 25°C
- ---0.02GHz
3 dBc Low Passband 8Temp = 25°C
- ---0.04GHz
30 dBc Low Pass Rejection Point 9Temp = 25°C
- ---0.08GHz
Low Passband Return Loss 10Temp = 25°C
- --26-dB
Low Pass Isolation 11Temp = 25°C
- --25-dB
Low Pass Group Delay 12Temp = 25°C
- --5689-ps
Crossover Isolation 13Temp = 25°C
- --11-dB
Crossover Frequency 14Temp = 25°C
- --0.05-GHz
Common Port Return Loss 15Temp = 25°C
- --24-dB
Impedance 16Temp = 25°C
- --50-Ω
1 dBc Low Passband -- -0-0.035GHz
1 dBc High Passband -- -0.07-10GHz
30 dBc Low Pass Rejection Point <0.015 GHz
- 0.0152535-dB
30 dBc Low Pass Rejection Point <0.035 GHz
- 0.035-20-dB
Common Port Return Loss 0.07 to 10 GHz
0.07 10-18-dB
Common Port Return Loss DC to 0.035 GHz
0 0.035-18-dB
Cross Over Frequency 0.05 GHz
0.05 0.05-5-%
DC Voltage -- ---25V
High Pass Filter, Pass Band Insertion Loss 0.07 - 10 GHz
0.07 10-0.71.4dB
High Pass Filter, Pass Band Return Loss 0.07 - 10 GHz
0.07 10-18-dB
Isolation <0.03 GHz
- 0.031424-dB
Isolation 0.075 - 10 GHz
0.075 101424-dB
Low Pass Filter, Pass Band Insertion Loss DC to 0.035 GHz
0 0.035-0.71.4dB
Low Pass Filter, Pass Band Return Loss DC to 0.035 GHz
0 0.035-18-dB
Low Pass Filter, Stop Band Rejection 0.07 - 3 GHz
0.07 3-24-dB
Low Pass Filter, Stop Band Rejection 3 - 10 GHz
3 102030-dB
RF Power -- ---1W

Rev: A | Copyright © 2013, 2019 Marki Microwave LLC.

5

[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] No

Rev: A | Copyright © 2013, 2019 Marki Microwave LLC.

6

Typical Performance Plots from DC - 1GHz

Insertion Loss (dB) graph for DPXN-M50
Return Loss (dB) graph for DPXN-M50
Isolation (dB) graph for DPXN-M50
Common Port Return Loss (dB) graph for DPXN-M50

Rev: A | Copyright © 2013, 2019 Marki Microwave LLC.

7

Typical Performance Plots from 1-10GHz

Insertion Loss (dB) graph for DPXN-M50
Return Loss (dB) graph for DPXN-M50
Isolation (dB) graph for DPXN-M50
Common Port Return Loss (dB) graph for DPXN-M50

Rev: A | Copyright © 2013, 2019 Marki Microwave LLC.

8

Mechanical Data

Rev: A | Copyright © 2013, 2019 Marki Microwave LLC.

9