Filters, Antenna filters

The short wave, but also other bands are affected by interferences. Some of these stem from natural processes, for example noise from thunderstorms or processes in the ionosphere, others are man-made disturbances. These are caused by nearby transmitters, by misaligned transmitter signals and also by overstrained receiver inputs.


In most cases, filters can be a great help here. A high frequency filter limits the bandwidth that is received, for example from the antenna to the receiver, or from the power amplifier to the antenna. In this way unnecessary components of the signal are filtered out. Modern SDR receivers implement the filter technology in the form of algorithms in the processor, but practice has shown that classical filters still offer many possibilities to improve reception.


Other filter technology is used to suppress interference from devices, for example in the case of direct radiation. Here WiMo offers a wide range of ferrites, which are not only used to build transformers, but can also be used as chokes to effectively prevent direct radiation.

 

Items 1-10 of 74

Filter
  1. 403A Band Pass Filter XL Series
    403A Band Pass Filter XL Series

    Superlative bandpass filter, min. 55 dB blocking depth outside the band, max. power handling up to 4500 Watt, active cooling can be switched on. Optionally N or PL connections.

    In stock, shipped in 1 to 2 days

    As low as: €479.00
    incl. VAT, plus shipping €402.52
  2. Yaesu XF-130CN Filter
    Yaesu XF-130CN Filter

    CW Narrow Roofing Filter Yaesu XF-130CN, 300 Hz, 9.005 MHz IF.

    In stock, shipped in 1 to 2 days

    €149.00
    incl. VAT, plus shipping €125.21
    SKU XF-130CN
  3. Bandpass filter for Colibri-SDR
    Bandpass filter for Colibri-SDR

    Optional bandpass filter board for Colibri SDR receivers, with switchable preamplifier and attenuator. Increases the large signal strength of the receiver.

    In stock, shipped in 1 to 2 days

    View accessories
    €259.00
    incl. VAT, plus shipping €217.65
    SKU COLIBRI-BPF
  4. High-Power Bandpass Filters 2kW PEP
    High-Power Bandpass Filters 2kW PEP

    Ideal for contest, with PL or N sockets, 50 Ω, 50 x 100 x 65mm

    In stock, shipped in 1 to 2 days

    As low as: €279.00
    incl. VAT, plus shipping €234.45
  5. Bandpass filter/preamplifier 6m, 2m or 70cm
    Bandpass filter/preamplifier 6m, 2m or 70cm

    Bandpass filter and preamplifier in one housing. Different models for 50/144/432 MHz, 2 or 3 outputs, suitable for high transmit power.

    In stock, shipped in 1 to 2 days

    View accessories
    As low as: €269.00
    incl. VAT, plus shipping €226.05
  6. Yaesu MTU External Band Filter 160 - 20m
    Yaesu MTU External Band Filter 160 - 20m

    External band filters 160m, 80/40m or30/20m, for various Yaesu transceivers

    In stock, shipped in 1 to 2 days

    As low as: €619.00
    incl. VAT, plus shipping €520.17
  7. Elad High/Lowpassfilter 500kHz/1700kHz
    Elad High/Lowpassfilter 500kHz/1700kHz

    Elad Low/Highpassfilter 500kHz/1700kHz, for FDM-DUO, FDM-DUO-R, QSF-06, SPF-08 and FDM-S3

    In stock, shipped in 1 to 2 days

    As low as: €22.00
    incl. VAT, plus shipping €18.49

Items 1-10 of 74

Filter

FAQ

What is an antenna filter and what is it used for?
An antenna filter is a device that prevents interference in signal transmission and provides a clear signal. It is used to reduce interference from other electrical devices or radio networks and improve the signal for audio or video transmission.
What are the types of antenna filters?
There are different types of antenna filters, such as bandpass filters, notch filters and diplexers. Each filter has a specific application area and may be optimized for specific radio frequencies. It is important to select the right filter for your needs.
How do I install an antenna filter?
Installing an antenna filter can vary depending on the model and application. Generally, the filter is connected between the antenna and the receiver. It is important to read the manufacturer's instructions carefully and follow all steps exactly to ensure a flawless installation.