Accessibility Links

Skip to main contentAccessibility help
Accessibility feedback
Seasonal Holidays 2025
Go to Google home
Press / to jump to the search box
Choose what you’re giving feedback on
  • Delete
  • See more
  • Delete
    • See more
    • Report inappropriate predictions
    Quick Settings
    Sign in

    Filters and Topics

    AI Mode
    All
    Shopping
    Images
    Videos
    Short videos
    News
    More
    Forums
    Web
    Books
    Maps
    Tools
    Any time
    Any time
    Past hour
    Past 24 hours
    Past week
    Past month
    Past year
    Custom range...
    Custom date range
    Go
    All results
    All results
    Verbatim
    Advanced Search
    About 444,000 results (0.35s) 
    Ctrl+Shift+X to select

    Refine results

    • Price
      • Under $200
      • $200 - $450
      • $450 - $900
      • Over $900
      • $
        Please provide a valid price.
        $
        Please provide a valid price.
    • Sort by
      • Price: low to high
      • Price: high to low
    • Stores
      • eBay
      • DigiKey
      • EveryMarket
      • Ham Radio Outlet
      See more
    • Color
      • Green
      • Black
      • Gray
      • Brown
      See more
    • Free shipping
      • Free shipping
    • Brand
      • Mini Circuits
      • Comet
      • Diamond
      • L-com
      See more
    Failed to load more results. Please try again later.
    Price
    Reviews
    For Sale
    On sale
    New
    Used
    Get it fast
    Under $200
    Cable Repeaters & Signal ...
    Replacement
    Audio & Video Cables
    eBay
    Location
    Green
    Black
    Gray
    Brown
    Blue
    Splitter
    DigiKey
    EveryMarket
    Small business
    Ham Radio Outlet
    DX Engineering
    Free shipping
    GigaParts.com

    Search Results

    AI Overview

    An AI Overview is not available for this searchCan't generate an AI overview right now. Try again later.
    AI Overview
    An RF Duplexer with High Isolation
    allows simultaneous transmit (Tx) and receive (Rx) on a single antenna by strongly separating the powerful Tx signal from the sensitive Rx path, preventing self-interference (desense). This is achieved using filters (like cavity or SAW) to route frequencies, with high isolation (80-90+ dB) being critical for clean communication in systems like repeaters, cellular, and amateur radio. Key specs include isolation, low insertion loss (less signal loss), and power handling. 
    This video provides an overview of how duplexers work to separate signals:
    Related video thumbnail
    59s
    Rohde & Schwarz
    YouTube • Aug 28, 2025
    How High Isolation Works 
    • Filtering: Duplexers use precise bandpass/band-reject filters (often multiple cascaded cavity filters) to create distinct paths for Tx and Rx frequencies.
    • Signal Separation: The Tx signal is filtered to go to the antenna, while the Rx signal is filtered to go to the receiver, with minimal bleed-through between paths.
    • Cavity Count: More cavities (e.g., 6-8 vs. 4) generally provide better filtering and higher isolation, crucial for professional systems. 
    You can see how the duplexer is tuned in this video:
    Related video thumbnail
    52s
    RFMAN RFMAN
    YouTube • Aug 8, 2021
    Key Performance Metrics 
    • Isolation (dB): Measures how well the Tx signal is blocked from the Rx port; higher is better (e.g., 80-90 dB for good systems).
    • Insertion Loss (dB): Signal power lost passing through the duplexer; lower is better (e.g., <1.5 dB).
    • Power Handling (Watts): Max Tx power the duplexer can safely handle. 
    This video explains the importance of tuning a duplexer:
    Related video thumbnail
    38s
    Red Summit RF
    YouTube • Dec 15, 2024
    Applications 
    • Two-Way Radios & Repeaters: Allows a single antenna for simultaneous talking and listening.
    • Cellular Networks: Used in base stations and boosters (DAS) for simultaneous data/voice.
    • Amateur Radio: Simplifies station setup for HF/VHF/UHF operation. 
    This video demonstrates the tuning of a duplexer with a spectrum analyzer:
    Related video thumbnail
    56s
    w2aew
    YouTube • Nov 4, 2017
    Types 
    • Cavity Duplexers: Common for high-power/high-performance, using physical resonators.
    • SAW Duplexers: Surface Acoustic Wave, for smaller, lower-power applications like mobile devices. 
    In essence, high isolation ensures your loud transmission doesn't deafen your receiver, providing clear, reliable communication over a shared antenna. 
    • Duplexers - Calumet Radio
      High Isolation: This is the most crucial spec. It measures how well the duplexer blocks your powerful transmit signal from reachin...
      Calumet Radio
    • Saw Duplexer - Abracon
      Introduction. Introducing Abracon's first release of RF SAW duplexers (Surface Acoustic Wave duplexers), designed for use in radio...
      Abracon
    • RF Duplexers - MCV Microwave
      FAQ about RF duplexers. What is an RF Duplexer? An RF duplexer is a passive device that allows simultaneous transmission and recep...
      MCV Microwave
    Show all
    • Duplexers - Calumet Radio
      High Isolation: This is the most crucial spec. It measures how well the duplexer blocks your powerful transmit signal from reachin...
      Calumet Radio
    • Saw Duplexer - Abracon
      Introduction. Introducing Abracon's first release of RF SAW duplexers (Surface Acoustic Wave duplexers), designed for use in radio...
      Abracon
    • Understanding Duplexers
      Aug 27, 2025 — let's end with a brief summary duplexers are three-port RF devices that allow the simultaneous use of closely spaced t...
      YouTube·Rohde & Schwarz
      59s
    • RF Duplexers - MCV Microwave
      FAQ about RF duplexers. What is an RF Duplexer? An RF duplexer is a passive device that allows simultaneous transmission and recep...
      MCV Microwave
    • ADRF BDA-DAS Duplexers & Multiplexers - Callmc
      Mar 30, 2025 — Precision Frequency Separation Technology. ADRF duplexers incorporate advanced filtering technology that achieves exce...
      Callmc
    • Duplexer - Wikipedia
      A duplexer is an electronic device that allows bi-directional (duplex) communication over a single path. In radar and radio commun...
      Wikipedia
    • Measuring Duplexer Isolation and Working Principles - ALLPCB
      Sep 11, 2025 — Higher isolation means better separation between transmit and receive channels. Insertion loss: The power loss experie...
      ALLPCB
    • 4 Ways to Implement a High Isolation Duplexer for a Transceiver
      Oct 10, 2019 — The first duplexer design utilizes a very high isolation Marki PBR power combiner/splitter to split the incoming signa...
      Marki Microwave
    • CF-4160J Comet Duplexer High-Isolation HF/VHF/UHF ...
      * The CF 4160J Comet Duplexer provides efficient separation of HF, VHF, and UHF signals, allowing operators to run multiple antenn...
      Amazon.com
    • Improving signal isolation in hybrid RF duplexer utilizing a band ...
      By increasing isolation in RF duplexers, the interference between different signals is minimized, leading to a cleaner and more st...
      ScienceDirect.com
    • Duplexer - RF-Lambda
      RF Lambda's duplexers are used to combine two frequencies or signals from different systems on to a common antenna. They offer hig...
      www.rflambda.com
    Dive deeper in AI Mode
    AI responses may include mistakes. Learn more
    Positive feedback
    Negative feedback
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedbackReport a problemClose
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedbackReport a problemClose
    Thank you
    Your feedback helps Google improve. See our Privacy Policy.
    Share more feedbackReport a problemClose
    Show more
    Explain this
    Related images
    Copy text
    Access this menu with Ctrl+Shift+X
    My Ad Center

    4 Ways to Implement a High Isolation Duplexer for ...


    Marki Microwave
    https://markimicrowave.com › ... › Application Notes
    Marki Microwave
    https://markimicrowave.com › ... › Application Notes
    Oct 11, 2019 — A high rejection cavity duplexer is an all in one duplexer system that can achieve very high isolation and is very commonly used.Read more

    CF-4160J Comet Duplexer High-Isolation HF/VHF/UHF ...


    Amazon.com
    https://www.amazon.com › Comet-CF-4160J-Duplexers
    Amazon.com
    https://www.amazon.com › Comet-CF-4160J-Duplexers
    Built with precision RF components that deliver high isolation between frequency ranges, this duplexer reduces unwanted interference and improves overall ...Read more

    High Isolation RF Duplexer


    Maniron
    https://www.manirontronics.com › high-isolation-rf-du...
    Maniron
    https://www.manirontronics.com › high-isolation-rf-du...
    800MHz 100W RF Duplexer With SMA Type And High Isolation. This duplexer covers frequency band RX:806 ...Read more

    Duplexer - RF-Lambda


    rflambda.com
    https://www.rflambda.com › product › cavityduplexer
    rflambda.com
    https://www.rflambda.com › product › cavityduplexer
    RF Lambda's duplexers are used to combine two frequencies or signals from different systems on to a common antenna. They offer high isolation and low insertion ...Read more

    RF Duplexers


    MCV Microwave
    https://mcv-microwave.com › clearcomm-rf-products › r...
    MCV Microwave
    https://mcv-microwave.com › clearcomm-rf-products › r...
    ClearComm RF duplexers by MCV are engineered for superior isolation, low insertion loss, and excellent return loss across a broad frequency spectrum.Read more
    Videos
    Understanding Duplexers
    YouTube · Rohde & Schwarz
    Aug 28, 2025
    YouTube · Rohde & Schwarz
    20:52
    Duplexers are 3-port RF devices that enable simultaneous TX/RX on a single antenna. They provide isolation, low loss, and protection from external transmitters/receivers.
    Rohde & Schwarz
    YouTube·
    Aug 28, 2025

    Understanding Duplexers

    YouTube·Rohde & Schwarz·Aug 28, 2025
    YouTube
    In this video
    • 00:06
      Introduction
    • 02:01
      Duplexer Construction
    • 04:17
      Disadvantages to a Duplexer Built Only from Bandreject Filters
    • 08:27
      Filter Tuning
    • 09:47
      Basic Types of Duplexer Measurements
    • 11:16
      Attenuation Measurement on a Band Reject Duplexer
    • 14:04
      Isolation
    • 15:42
      Standing Wave Ratio Swr or Return Loss
    • 16:43
      Return Loss Measurement
    • 20:02
      Common Measurements
    Diplexer (Duplexer) Part 2!
    YouTube · FEPLabs Radio
    Jan 16, 2025
    YouTube · FEPLabs Radio
    17:01
    Diplexer vs. duplexer explained: Diplexer separates frequencies, duplexer separates transmit/receive.
    FEPLabs Radio
    YouTube·
    Jan 16, 2025

    Diplexer (Duplexer) Part 2!

    YouTube·FEPLabs Radio·Jan 16, 2025
    YouTube
    #270: Tune a Duplexer with a Spectrum Analyzer + Tracking ...
    YouTube · w2aew
    Nov 4, 2017
    YouTube · w2aew
    10:58
    Tune a duplexer by adjusting screws on resonant cavity notch filters using a spectrum analyzer and tracking generator or a VNA for better dynamic range.
    w2aew
    YouTube·
    Nov 4, 2017

    #270: Tune a Duplexer with a Spectrum Analyzer + Tracking ...

    YouTube·w2aew·Nov 4, 2017
    YouTube
    In this video
    • 00:00
      Intro
    • 00:46
      How a duplexer works
    • 01:55
      Band pass filters
    • 03:02
      Duplexer adjustments
    • 03:40
      Setting up the sweep
    • 05:01
      Adjusting third slug
    • 06:53
      Notch width
    • 07:33
      Viewing the passband characteristics
    • 08:50
      Reducing IF bandwidth to 1khz
    • 10:37
      Summary
    Feedback
    View all

    Duplexer, 380–512 MHz, 6-Cavity, High-Isolation


    Sinclair Technologies
    https://www.sinctech.com › products › uhf-duplexer-380...
    Sinclair Technologies
    https://www.sinctech.com › products › uhf-duplexer-380...
    Robust Res-Lok Construction: Eliminates inter-cavity cabling, enhancing long-term stability & ruggedness • High Isolation: >85 dB Tx-Rx isolation minimizes ...Read more

    High isolation diplexer for rf circuits using loop resonators


    IEEE Xplore
    https://ieeexplore.ieee.org › document
    IEEE Xplore
    https://ieeexplore.ieee.org › document
    by M Ranjith · 2017 · Cited by 5 — A high isolation Diplexer with Pentagonal Open Loop Resonators (P-OLR) is presented in this paper. The Diplexer contains two resonators providing pass bands ...
    Missing: Duplexer ‎| Show results with: Duplexer

    VHF Mobile Notch Duplexer, Rugged, 150-174MHz, 4.6 ...


    RFI Americas
    https://www.rfiamericas.com › ... › Duplexers
    RFI Americas
    https://www.rfiamericas.com › ... › Duplexers
    The good Lo to Hi port-to-port isolation reduces the risk of carrier desensitisation in the nominated Rx port. A range of different Tx to Rx splits in the ...Read more

    ADRF BDA-DAS Duplexers & Multiplexers


    Callmc
    https://callmc.com › News
    Callmc
    https://callmc.com › News
    Mar 31, 2025 — High Isolation: Minimum 80 dB preventing interference ... Comprehensive RF Testing: All duplexer and multiplexer products undergo extensive RF ...Read more

    Duplexers


    Calumet Radio
    https://calumetradio.net › duplexers
    Calumet Radio
    https://calumetradio.net › duplexers
    High Isolation: This is the most crucial spec. It measures how well the duplexer blocks your powerful transmit signal from reaching your very sensitive receiver ...Read more
    Popular products
    • Comet Duplexer Antenna.
      Comet Duplexer Antenna
      $59.95
      Ham Radio Outlet       & more
      5.0(2)
      Comet Duplexer Antenna
      $59.95
      Ham Radio Outlet       & more
      5.0(2)
    • Comet CF-4160J Duplexer.
      Comet CF-4160J Duplexer
      $59.95
      Ham Radio Outlet       & more
      5.0(11)
      Comet CF-4160J Duplexer
      $59.95
      Ham Radio Outlet       & more
      5.0(11)
    • LOW PRICE
      Comet Cf530c Duplexer. Low price.
      Comet Cf530c Duplexer
      $76.95Usually $83
      R.W. Antennastore       & more
      Free delivery
      5.0(4)
      LOW PRICE
      Comet Cf530c Duplexer
      $76.95Usually $83
      R.W. Antennastore       & more
      Free delivery
      5.0(4)
    • 75 Ohm Diplexer.
      75 Ohm Diplexer
      $42.79
      Fairview Microwave
      75 Ohm Diplexer
      $42.79
      Fairview Microwave
    • Diplexer MX-72D Diamond Antenna.
      Diplexer MX-72D Diamond Antenna
      $46.99
      DX Engineering       & more
      5.0(4)
      Diplexer MX-72D Diamond Antenna
      $46.99
      DX Engineering       & more
      5.0(4)
    • Diplexer 20 to 862 MHz Low Pass 950 to 2300 MHz High Pass.
      Diplexer 20 to 862 MHz Low Pass 950 to 2300 MHz High Pass
      $36.39
      L-com Global Connectivity
      Diplexer 20 to 862 MHz Low Pass 950 to 2300 MHz High Pass
      $36.39
      L-com Global Connectivity
    • Comet CF 706 Duplexer.
      Comet CF 706 Duplexer
      $86.95
      R.W. Antennastore       & more
      Free delivery
      5.0(6)
      Comet CF 706 Duplexer
      $86.95
      R.W. Antennastore       & more
      Free delivery
      5.0(6)
    • Diamond Antenna.
      Diamond Antenna
      $59.95
      Ham Radio Outlet
      Diamond Antenna
      $59.95
      Ham Radio Outlet

    Scholarly articles for RF Duplexer High Isolation

    A design technique to enhance isolation of duplexer in … - ‎Tsutsumi - Cited by 20
    … duplexer with antenna impedance tracking and high … - ‎Abdelhalem - Cited by 117
    … of super-isolation duplexer on SAW-less receiver RF … - ‎Tsutsumi - Cited by 11

    Ads

    People also search for
    Diy rf duplexer high isolation
    RF-Lambda Attenuator
    RF-Lambda Filters

    Page Navigation

    12345678910Next

    Footer Links

    New York
     - Based on your past activity
     - 
    Update location
    Can't update your location
    Learn more
    Updating location...
    HelpSend feedbackPrivacyTerms
    Google apps
    AI overview is ready