This is radiospurs. A UK based web site for those interested in Broadcasting engineering (FM, mobile, microwave, power slablines, hybrid couplers)
After many years running around the broadcast, microwave, wan/lan worlds this is what we get: a group of web sitse that give you real practical information on what you have always wanted to know about broadcast equipment and some other related topics-
Starting with this web site on FM broadcast ancillary equipment: Stereo Generator, RDS generator, software clips for TX monitoring, SNMP, SNTP.
A gamut of passive filter online calculators: Butterworth, Chebychev type 1, Chebychev Type 2, Elliptic, Papoulis, Bessel, Guassian filters can be design and analysed. Choose components from a catalog.
A gamut of online calculators for all things microwave: There is classical microstrip, suspended microstrip, stripline, slabline, coaxial line, powerline, microstrip couplers, stripline couplers, stepped impedance microstrip transformers.
A collection of online calculators for power combiners: There is the classical two way wilkinson, a three way wilkinson both microstrip and lumped with intergrated LPF, a lumped element multistage hybrid combiner, power capacitors, power inductors.
For the analysis and design of microwave components: Symmetrical / Asymmetrical multistep couplers with positive / negative profiles, a custom multistep profile analysis.
Some microwave filters like an Interdigital designer.