I need a log periodic broadband antenna covering the 700MHz to 4 or
6GHz range for ambient field measurements. They are several hundred dollars from test equipment suppliers. But, with due respect, there doesn't seem to be that much to them, in terms of construction.Has anyone by chance seen a low cost PCB version of these for sale? If not, is one feasible, say using an applet like the one below to design the segments?
Bob Morris
Bob Morris schrieb:
Hello,
the normally used PCB material FR4 will be not suitable for frequencies of several GHz, you should use a special HF PCB material.
Bye
See:
Kent Britain, WA5VJB, "Designing PCB Log Periodic Antennas," Proceedings of Microwave Update 2000, ARRL, 2000, pp. 203-208.
The cost isn't in the production, rather the design and calibration. That has to be made up on a fairly small quantity sold, so...
Hi Bob, Try
I need a log periodic broadband antenna covering the 700MHz to 4 or
6GHz range for ambient field measurements. They are several hundred dollars from test equipment suppliers. But, with due respect, there doesn't seem to be that much to them, in terms of construction.Has anyone by chance seen a low cost PCB version of these for sale? If not, is one feasible, say using an applet like the one below to design the segments?
Bob Morris
Horsefeathers.
Jim
Even if the material is very thin?
-- Failure does not prove something is impossible, failure simply indicates you are not using the right tools... nico@nctdevpuntnl (punt=.) --------------------------------------------------------------
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