Attenuation Upgrading Filter

2019-11-14

Attenuation Upgrading Filter is a bandpass filter that can upgrade Attenuation value. According to customer needs, with the center frequency, bandwidth, and other parameters unchanged, it is the type of filter that only improves the performance of Attenuation value; especially each increase can add 10db up performance.

At present, Temwell technical team can upgrade up to 4 times, that is, it can provide a minimum 40db increase in value and maintain other parameters unchanged. This advantage can be given the greatest value for rapid development requirement or limited development budget situation. Under this support of the customized development schedule, the filter design of the new specifications can be completed within 14 days, and even the actual samples can be finished to process the physical testing.

When the RF design loop has been completed and the FC, BW, IL has been confirmed not to change, it needs to be adjusted or improved only for Attenuation, Attenuation Upgrading Filter will be the best Filter type, which can provide RF engineers with simple and fast solution, which saves the trouble of redesigning, and only needs to consider how many Attenuation values are needed in the plan. In other words, Attenuation Upgrading Filter is a fast and predictable custom filter that can increase Attenuation value as needed.

/storage/media/application/upgrading_Filter/upgrading_filter-2.jpg

Temwell group has a strong development team, is a world-class filter design expert, can quickly provide professional filter proposal. Especially in the High Attenuation section, according to different needs, under the confirmed FC, BW, IL, focus in professional development of Attenuation value and provide the most appropriate Attenuation Filter solution.

Temwell Attenuation Upgrading Filter works by adding the number of pole (section), in the case of FC, BW, IL fixed, to increase the value of Attenuation. Next, let me show and demo The physical performance curve and data at Temwell 4 pole filter, 5 pole filter, and 6 pole filter as following, you can clearly find that for every 1 pole (section) added, the Attenuation value can obviously increase the value of 10 dB, while other parameters do remain unchanged.


A. 3 type High Attenuation Series (4pole / 5pole / 6pole)
/storage/media/application/upgrading_Filter/4p_filter.png
Helical Filter-7H4 Series

/storage/media/application/upgrading_Filter/5p_filter.png
Helical Filter-7H5 Series
/storage/media/application/upgrading_Filter/6p_filter.png

Helical Filter-7H6 Series

B. Attenuation Upgrading Demo Specification ( from 4 pole to 6 pole)

◎ Demo Performance- 4 pole Filter under the same Frequency  
Type Specify
 Center Frequency 535            MHz
 -3 dB Bandwidth Type          28             MHz
 Insertion Loss Type          3.5               dB
 Attenuation Fo-40MHz Type           43               dB
 Attenuation Fo+40MHz Type           33               dB
 Return Loss Min.            12               dB
 Impedance 50  ohm 
 Ripple < 1 dB
/storage/media/application/upgrading_Filter/4p_perforamnce.png


◎ Demo Performance- 5 pole Filter under the same Frequency
Type Specify
Center Frequency 535            MHz
 -3 dB Bandwidth Type          28             MHz
 Insertion Loss Type          3.5               dB
 Attenuation Fo-40MHz Type           60               dB
 Attenuation Fo+40MHz Type           43               dB
 Return Loss Min.            12               dB
 Impedance 50  ohm 
 Ripple < 1 dB
/storage/media/application/upgrading_Filter/5p_perforamnce.png


◎ Demo Performance- 6 pole Filter under the same Frequency
Type Specify
Center Frequency 535            MHz
 -3 dB Bandwidth Type          28             MHz
 Insertion Loss Type          3.5               dB
 Attenuation Fo-40MHz Type           78               dB
 Attenuation Fo+40MHz Type           59               dB
 Return Loss Min.            12               dB
 Impedance 50  ohm 
 Ripple < 1 dB

/storage/media/application/upgrading_Filter/6p_perforamnce.png 






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