[SOLVED] Circuit diagram components

[oumik]

In the schematic below, what are the components circled in red?

 

[FvM]

Microstrip transmission lines used as matching circuit elements.

 

[oumik]

Microstrip transmission lines used as matching circuit elements.

Thank you for your answer. Is there a way to represent them in proteus schematic ? If not, what software do you recommend to simulate the above circuit?

 

[FvM]

The schematic info is incomplete, may be given in accompanying text. You can't derive electrical transmission line parameters (impedance, delay). Proteus isn't particularly suited for RF circuit analysis, it has ideal and RC delay line nothing else. Nevertheless it has generic SPICE analysis capabilities.

Keysight ADS can work with geometric description of microstrip elements.

 

[marce]

General schematic packages, as pointed out, are not the best for RF...
Depending on the design, in the past I have worked with two main methods...
For simpler rf designs, complex copper shapes are created as components and added to the schematic as a symbol, and on the PCB as a specific component.
On more complex rf designs, usually microwave, the entire RF line is imported onto the PCB as a DXF from software such as microwave office...
Here is a document that shows some of the funky shapes you can create in copper for rf layouts...

https://www.qsl.net/va3iul/Files/RF-Microwave_PCB_Design_and_Layout.pdf

What is also confusing to both software and people new to rf, are microstrip lines shorted with vias to the 0V (GND) signal... Here star-points are a good idea if the software allows them.
Have fun, rf is the Mad Hatter area of electronics.