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

Your IP is 44.211.31.134
ec2-44-211-31-134.compute-1.
Info
Valid HTML 4.01 Transitional Creative Commons Lizenzvertrag
rss
เราจะทำแบบวิศวกรผู้ยิ่งใหญ่
We love the King
24. July 2024
Your valuable opinion :
3.5 stars

Avg. 3.80 from 5 votes.



เราจะทำแบบวิศวกรผู้ยิ่งใหญ่
DIY-DualDirectionalCoupler-TCD-17-282X+.php    6374 Bytes    18-06-2024 22:36:22


DIY Dual Directional Coupler, 5 to 2850 MHz, 17 ±1 dB


Using twice the TCD-17-282X+



This is not a new invention. It's just a hack together of some (very) nice parts. And the result is an 'even nicer' part. (So we think :-)


DIY Dual Directional Coupler, 5 - 1000 MHz, 20 dB




✈ Hardware Description




This design uses two times an TCD-17-282X+ from Mini Circuits. A small printed circuit board was designed to offer adequate 50 Ω traces, as it should go up to 3000 MHz. The termination is done by two resistors 0805, 49.9 Ω. We used sma connectors to keep the geometry small. The case was milled from aluminium. Surface coated with nickel. As connectors, you mayst use MC000242 (Multicomp) or 142-0701-411 (JOHNSON).






✈ Performance




Figure 1. Coupling (INPUT - INCIDENT) or (OUTPUT - REFLECTED) of the DIY Dual Directional Coupler

Figure 1. Coupling (INPUT - INCIDENT) or (OUTPUT - REFLECTED)


Figure 2. Main Line Loss (INPUT - OUTPUT) of the DIY Dual Directional Coupler

Figure 2. Main Line Loss (INPUT - OUTPUT)


Figure 6. Directivity of the DIY Dual Directional Coupler

Figure 3. Directivity

Note : The directivity is the difference in dB of the power output of the two coupled ports, when power is transmitted in a constant direction on the main-line.

All measurements done with an hp 8753 ES. Looks like this is a candidate for VHF (< 299 MHz) measurements only.




✈ 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 = 6586 d

t2 = 298 ms

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

Impressum