Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
Umm, what do you mean by "controlled impedances"?
I was under the impression it was a voltage controlled switch of which I could use a microcontroller to output the control voltage required to activate the switch on... :???:
Also I couldn't find a suitable SPST switch hence I am using SPDT switches but with the other switch input unconnected.
So the error could be from the making of the sp6t component symbol and footprint?
And I should connect the V2 to the VCC (V1) even though I am not using V2?
The intended circuit operation should be that:
it is a frequency reconfigurable patch antenna, made out of five adjacent patches (just going to be pcb copper so not shown on schematic).
As the frequency increases, the number of patches turned on will concurrently increase as well (so for the first frequency the first patch will be turned on, for the second frequency the first and second patch will be turned on etc).
The frequency signal will come through a bnc and microstrip transmission line.
There are five frequency selections, and the user chooses which one with a rotary switch.
This is connected as input to the microcontroller.
Depending on the frequency option chosen by the user, the microcontroller will select (output) the appropriate LC impedance matching network path
(the sp6t switch with five LC networks), and also activate on the required switches between the patch elements (the spdt switch).
Hence the main function of microcontroller is just selecting which switches and paths to turn on.
The parts where the sp6t switch says feed means it is connected to one end of the microstrip pcb line (by the patches).
The parts where it says signal means it is connected to the other end of the microstrip line (by the bnc)
The zero ohm resistor is connected on the other side, by the ground plane (via).