UYPER-FRRQUENCY WAVE GUIDES 



305 



Indicators 



It is often desirable to have available in the laboratory some kind of 

 a wave indicator or probe such as shown in F^ii^. 14. This one con- 

 sists of a simple silicon detector in cartridge form, together with a 

 microammeter, both mounted on a fibre support of convenient size 

 and shape for exploring the fields prevailing around any piece of 

 apparatus. It is easy to show by this means that there are no ap- 

 preciable fields prevailing around a generator such as described above 

 except near the orifice. Also this probe may be used to determine the 



V\". 14 — A convenient probe for exploring the field around a source of waves. 



TO GALVANOMETER 



- J c^ V 



Fig. 15 — A detector mounting suitable for indicating the presence of waves in a guide. 



