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Are choke inductor and system impedance considered in parallel?
In the shematic image there is an antenna (50ohm) connected through SMA to the matching network. So chip's impedance together matching network's impedance make 50ohm.
As i read, using the formula XL=2*pi*f*L i have to obtain an...
Yes, it is. My supervisor has already used this chip and told me to insert a choke perhaps to have a clean signal or because the antenna also works in other frequency ranges above the frequency to which I have to work. My operating frequency is 866Mhz and the antenna also resonates in the range...
I understood the concept but it is not clear to me why you consider the parallel between the impedance of the choke and the characteristic impedance of the system, I would be grateful if you could clarify this.
Anyway we will use a reader to send a signal on the antenna, from it the signal will...
Sure, regarding SRF you're absolutely right.
In particular i have inductors of 39nH, using one of them i get: XL=2*pi*866Mhz*39nH, so XL=212,2ohm. Do you think I could use more inductors in series to reach 500ohm or more? Inductance-Frequency Characteristics is represented in datasheet, the...
So i have to do 500=2*pi*866Mhz*L and i have to solve the equations in order to know L? In particular the choke is on the negative side, i don’t know because you said ‘V+’. Also you could tell me why 500ohm is enough as impedance of the choke?
My system consists of a 50ohm antenna connected with SMA, a matching network between the antenna and my chip. I have been told to insert a choke on pin 'ant-' in order to have a filter, but I need to know the inductance value of this choke. With matching network I adapted the impedance of the...
I created a matching network between a 50ohm antenna and a chip with 63-j199 impedance. I have been told that on the 'ant -' pin I have to insert a choke inductor to act as a filter but I do not know how to calculate this inductance value. I saw that the formula XL=2*pi*L is used to get the...
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