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AD9371 EVB PCB design [vias each have a black square(copper removed) next to it]
There are many GND Vias between RF traces, but In the middle of the GND plane, some vias each have a black square(copper removed) next to it.
What's the reason behind this design?
We are considering follow the...
LO phase noise influence noise floor of a transmitter because of Reciprocal Mixing.
Spurious emission@antenna port = Pout(dBm) + LO_phase_noise(dBc/Hz)
See my blog for details about Reciprocal Mixing. **broken link removed**
EVM influenced by LO phase noise.
Influenced EVM =...
Parallel-coupled lines is popular topology for printed boards, for which open-circuit lines are the simplest to implement since the manufacturing consists of nothing more than the printed track. The design consists of a row of parallel λ/2 resonators, but coupling over only λ/4 to each of the...
Virtual instrumentation is the use of customizable software and modular measurement hardware to create user-defined measurement systems, called virtual instruments.
Traditional hardware instrumentation systems are made up of pre-defined hardware components, such as digital multimeters and...
Main Line Loss: The input power divided by the power at the direct port. (10*lg(pin/P_direct))
Coupling: At a given frequency (wn), coupling is the input power divided by the power at the coupled port. Mean coupling is the average value of the coupling values in the band. N is the number of...
You can try "Dual Behavior Resonator (DBR) Filter".
References:
IEEE Xplore - Narrow bandpass filters using dual-behavior resonators
IEEE Xplore - Narrow bandpass filters using dual-behavior resonators based on stepped-impedance stubs and different-length stubs
**broken link removed**...
Re: IP3 IIP3 P1dB lna rf
IP3: Third-order intercept point
The intercept point is a purely mathematical concept, and does not correspond to a practically occurring physical power level. In many cases, it lies beyond the damage threshold of the device.
The intercept point is obtained...
The Cascade calculation formula of Gain/NF/OP1dB/OIP3 are:
**broken link removed**
You can use **broken link removed** or **broken link removed** to calculate cascade specifacations.
The Cascade calculation formula of Gain/NF/OP1dB/OIP3 are:
**broken link removed**
You can use **broken link removed** or **broken link removed** to calculate cascade specifacations.
:razz:
It's because the Receiver sensitivity improved.
What is receiver sensitivity?
The Minimum Detectable Signal(MDS) power, Pi(min) at which a receiver can detect a signal, while providing an adequate SNRo(min) at analog receiver output or BER at digital receiver output, for demodulation is called...
Answer is a slight mistake above.
pi1 and pi2 represent the input power for the tones at f1 and f2, po1 and po2 represent the output power for the tones at f1 and f2, and po12 and po21 represent the output power for the tones at |2f1 – f2| and |2f2 – f1|.
Formulas for computing IP3:
OIP3 =...
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