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FILTER SOLUTION EXPERT
AND CONSULTANT

Customized RF Components and Microwave

2019-11-15

Passband bandwidth is the difference between the upper and lower cutoff frequencies. For example, a bandpass filter, a communication channel, or a signal spectrum. It is typically measured in hertz. A key characteristic of bandwidth is that any band of a given width can carry the same amount of information, regardless of where that band is located in the frequency spectrum. Bandwidth is a key concept in many radio communications applications. In radio communications, bandwidth is the frequency range occupied by a modulated carrier signal.

Amateur radio faces lots of signal interference affected communication. The interference may prevent reception altogether, may cause only a temporary loss of a signal, or may affect the quality of the sound or picture produced by your equipment. Use a higher bandwidth filter will make more suitable for amateur radio application.

proimages/application/bw-ham/SP-7H4.jpg  proimages/application/bw-ham/SP-7H5.jpg
Temwell helical band pass filter is a device that passes frequencies within a certain range and rejects frequencies outside that range. We provide various different bandwidth band pass filters for 6 standard amateur radio frequencies to protect their working frequency bands. The 6 standard amateur radio frequencies are 146 MHz, 232.5 MHz, 435 MHz, 915 MHz, 1270 MHz and 1282.5 MHz. The bandwidth included 5 MHz, 10 MHz, 20 MHz, 30 MHz, 50 MHz, 60 MHz, 70 MHz, 80 MHz, 120 MHz, 200 MHz, etc. Along with stable transmission of data, the higher bandwidth also has better anti-jamming capabilities. It can effectively protect signals from being interfered. You only need to use one λ/4-wave helical band pass filter to achieve high bandwidth. And the volume is not very large. Temwell helical band pass filter can reduce time and cost when designing.


 

A. Frequency: 146MHz Spec (Freq / BW) Size (LxWxH)   Accepted Type
TT67709B-146M 146MHz / 5MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TT63774A-146M 146MHz / 10MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TT63775B-146M 146MHz / 20MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TF69709B-146M 146MHz / 5MHz TF (30.5x7.6x12.5) Pin Type / Module Type
TF64790B-146M 146MHz / 10MHz TF (30.5x7.6x12.5) Pin Type / Module Type
TV6533B-146M 146MHz / 5MHz TV (38x7.6x12.5) Pin Type / Module Type

B. Frequency: 223.5MHz Spec (Freq / BW) Size (LxWxH) Accepted Type
TT6762B-223.5M 223.5MHz / 9MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TT63778B-223.5M 223.5MHz / 20MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TF64792A-223.5M 223.5MHz / 5MHz TF (30.5x7.6x12.5) Pin Type / Module Type
TF64793B-223.5M 223.5MHz / 10MHz TF (30.5x7.6x12.5) Pin Type / Module Type
TF64794F-223.5M 223.5MHz / 20MHz TF (30.5x7.6x12.5) Pin Type / Module Type
TV6536B-223.5M 223.5MHz / 10MHz TV (38x7.6x12.5) Pin Type / Module Type
TV6537A-223.5M 223.5MHz / 20MHz TV (38x7.6x12.5) Pin Type / Module Type
TV6538A-223.5M 223.5MHz / 50MHz TV (38x7.6x12.5) Pin Type / Module Type
C. Frequency: 435MHz Spec (Freq / BW) Size (LxWxH)  Accepted Type
TT67295B-435M 435MHz / 35MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TF69295B-435M 435MHz / 34MHz TF (30.5x7.6x12.5) Pin Type / Module Type

D. Frequency: 915MHz Spec (Freq / BW) Size (LxWxH)  Accepted Type
TT67550E-915M 915MHz / 26MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TT63782A-915M 915MHz / 55MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TT63783F-915M 915MHz / 80MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TF69550E-915M 915MHz / 27MHz TF (30.5x7.6x12.5) Pin Type / Module Type

E. Frequency: 1270MHz Spec (Freq / BW) Size (LxWxH)  AcceptedType
TT67810B-1270M 1270MHz / 60MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TF69810B-1270M 1270MHz / 60MHz TF (30.5x7.6x12.5) Pin Type / Module Type
F. Frequency: 1282.5MHz Spec (Freq / BW) Size (LxWxH)  Accepted Type
TT63784B-1282.5M 1282.5MHz / 20MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TT67426D-1282.5M 1282.5MHz / 25MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TT63788F-1282.5M 1282.5MHz / 200MHz TT (22.8x7.6x12.5) Pin Type / Module Type
TF64753D-1282.5M 1282.5MHz / 25MHz TF (30.5x7.6x12.5) Pin Type / Module Type
TF64803B-1282.5M 1282.5MHz / 120MHz TF (30.5x7.6x12.5) Pin Type / Module Type
TV6543B-1282.5M 1282.5MHz / 20MHz TV (38x7.6x12.5) Pin Type / Module Type
TV6544B-1282.5M 1282.5MHz / 50MHz TV (38x7.6x12.5) Pin Type / Module Type
TV6545B-1282.5M 1282.5MHz / 70MHz TV (38x7.6x12.5) Pin Type / Module Type


Temwell helical band pass filter is readily hand solderable, pin type, power 5 watts and acceptable fine-tune the frequency. You can order the filters on Shopline Store. On Shopline store we built over hundreds of standard helical band pass filter for selection. All filters are ready-made. Delivery within 72 hours. No minimum order quantity. Made in Taiwan with ISO certification, RoHS certification, REACH compliance and California Proposition 65 complicance. Click Temwell Filter Store to see details or email sales@temwell.com.tw