Categories
Statistics
Flag Counter
Since 08.08.2014
Counts only, if "DNT = disabled".

Your IP is 44.201.64.238
ec2-44-201-64-238.compute-1.
Info
Valid HTML 4.01 Transitional Creative Commons Lizenzvertrag
rss
เราจะทำแบบวิศวกรผู้ยิ่งใหญ่
We love the King
29. March 2024
Your valuable opinion :
4.5 stars

Avg. 4.95 from 84 votes.



March 2024 Tea Time :-)
Helical_Bandpass_Filter_Designer.php   7114 Bytes    14-12-2014 21:19:16


Helical Bandpass Filter Designer


Suiteable for the VHF range ( 50 ... 1000 MHz )




Helix Bandpass Filter



Center Frequency [MHz]

Bandwidth [MHz]

   

System Impedance [Ω]

Maximum Passband loss [dB]

   

Resonator is in a

  enclosure / cavity

   

 


RESULTS


Unloaded Q of the Resonator

Impedance of the Resonator [Ω]

Diameter Helix [mm]

Height Helix [mm]

Number of turns

Wire Diameter [mm]

    ± 10 %.

Tap at [turns] [mm] [deg]

    from gnd.

Width Cavity [mm]

    if round then diameter.

Height Cavity [mm]

Height Separator [mm]

Space above/below Helix [mm]





✈ Hints




More information can be found in the ARRL handbook, chapter 12, "Helical Resonators".

A second source to be mentioned is the "Handbook of Filter Synthesis" by Anatol I. Zverev, ISBN: 9780471749424

Instead of the tuning slug, a trimmer capacitor mayst be used. This has the advantage, that the helix is mechanically stabilised.




✈ Share your thoughts



The webmaster does not read these comments regularely. Urgent questions should be send via email. Ads or links to completely uncorrelated things will be removed.


Your Browser says that you allow tracking. Mayst we suggest that you check that DNT thing ?

 
t1 = 6469 d

t2 = 348 ms

★ ★ ★  Copyright © 2006 - 2024 by changpuak.ch  ★ ★ ★

PRchecker.info Impressum