Here is an image of an LNB circuit:
Probably you heard something about length-tunned traces that they use in high-frequencies PCBs. There is something similar to the length-tunned traces in the PCB(blue circle) but it's not length-tunned trace because they are cutted-out. What could be they?
Best Answer
It is a special transmission line filter topology, called "hairpin filter" because the line sections look like hair pins.
It is most likely used as a band-pass filter of some sort in this circuit.
More on these filters can be found on the wikipedia page for distributed element filters: https://en.wikipedia.org/wiki/Distributed_element_filter
The following document shows a few examples for hairpin band-pass filters:
http://www.w1ghz.org/filter/Recipes_for_Printed_Hairpin_Filters.pdf