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Thanks Chuckey
I dont have board in hand right now and delivery will take some time
I will try it once I get the board and then I will get back to you on this
Thanks again
Hello,
In Analog Devices DDS AD9852 Datasheet it is mentioned that in order to power up evaluation board;
3.3V Vcc, 3.3V DVDD and 3.3V AVDD are required with a common ground.
On Analog Devices website it is mentioned in feedback section that a single 3.3V supply will not be a good option...
Initially I tried Standard Branch line coupler but i was unable to achieve desired S11 at 10 Ghz
Standard Branch Line Coupler has less bandwidth, my design is a modification of standard branch line coupler.
By adding one segment to it, its bandwidth increases
So my modified design performs same...
I checked the design using 100k resistor
Now although S-Parameters are Still fine
S11:-22 dB
S22:-18 dB
S21:-6.4 dB
But now phase shift is restricted to 1 GHz only (Previously 2.2 GHz)
Please Advise!
Need urgent help
Its is a 180 degree coupler/ rat race coupler (branch line not circular!)
I am using microstrip inductor for blocking ac and otherwise it will travel to my power supply
I want to design a Phase Shifter at 10 GHz using FR4.
I am using branchline coupler followed by two varactors at port 2 and 3 (port 1 is input and 4 is output).
Although FR4 is not suitable for high frequencies but I am getting S11 and S22 below -14db at 10 GHz
The problem is in Phase of...
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