Difference between revisions of "SWR/Power meter"
From Note to self
(Created page with "= Links = * [https://www.youtube.com/watch?v=byF1FLdbUiA W2AEW Tutorial about directional couplers] (Very very good) * [http://www.citrus-electronics.com/subpage.html QEX Arti...") |
|||
| Line 1: | Line 1: | ||
| + | |||
= Links = | = Links = | ||
* [https://www.youtube.com/watch?v=byF1FLdbUiA W2AEW Tutorial about directional couplers] (Very very good) | * [https://www.youtube.com/watch?v=byF1FLdbUiA W2AEW Tutorial about directional couplers] (Very very good) | ||
| Line 4: | Line 5: | ||
* [http://www.analog.com/media/en/training-seminars/tutorials/MT-094.pdf Microstrip and Stripline Design ] Analog Devices Tutorial | * [http://www.analog.com/media/en/training-seminars/tutorials/MT-094.pdf Microstrip and Stripline Design ] Analog Devices Tutorial | ||
* [http://home.arcor.de/yo4gms/Directional%20Coupler%20pa0nhc.htm Directional Couplers / SWR detectors for 145MHz - 435MHz] | * [http://home.arcor.de/yo4gms/Directional%20Coupler%20pa0nhc.htm Directional Couplers / SWR detectors for 145MHz - 435MHz] | ||
| + | * [http://www.multek.se/engelska/engineering/pcb-structures-2/embedded-microstrip-impedance-calculator-2 Multi-Teknik Impedance calculator] | ||
| + | = Step 1 = | ||
| + | The plan is to make a test setup, somewhat like what W2AEW did, but with an embedded microstrip design like in the QEX article. The idea is then to measure properties with my N2PK VNA. Or at least, try to. | ||
| + | |||
| + | == Impedance == | ||
| + | So, the big problem, how wide should the traces be. According to the calculator from Multi-Teknik, referencenced in the QEX calculator, I get a width that varies a bit around 2.1mm (trace thickness = 0.035mm, h=1.6mm, total height = 3.2mm, Er=4.2...4.8). | ||
Revision as of 22:56, 9 November 2015
Links
- W2AEW Tutorial about directional couplers (Very very good)
- QEX Article about a SWR meter using AD8307 logamps
- Microstrip and Stripline Design Analog Devices Tutorial
- Directional Couplers / SWR detectors for 145MHz - 435MHz
- Multi-Teknik Impedance calculator
Step 1
The plan is to make a test setup, somewhat like what W2AEW did, but with an embedded microstrip design like in the QEX article. The idea is then to measure properties with my N2PK VNA. Or at least, try to.
Impedance
So, the big problem, how wide should the traces be. According to the calculator from Multi-Teknik, referencenced in the QEX calculator, I get a width that varies a bit around 2.1mm (trace thickness = 0.035mm, h=1.6mm, total height = 3.2mm, Er=4.2...4.8).
