WAVEGUIDE HYBRID RINGS FOR MICROWAVES 



485 



Power Division. Input at /. Relative 

 power output at Oi or O2 in db (approx. 

 constant over band) 



Transmission Loss (Isolation) between Oi 

 and O2 in db (approx. constant over band). 

 / terminated. 



Standing Wave Ratio (SWR) in db at 7. 

 Outlets Oi and O2 terminated. 



Experimental values at % (X — Xo)/Xo 



Case B: 1|X; Four Arms; Impedance Match \/2Z = Zq ; Reference Fig. 9b: 



Power Division. Input at /. Relative 

 power output at Oi or O2 in db (approx. 

 constant over band). 



Transmission Loss (Isolation) between Oi 

 and O2 in db / and D terminated. 



Transmission Loss (Isolation) between 5 and 

 D in db Oi and O2 terminated. 



Standing Wave Ratio (SWR) in db at / (5). 

 Outlets at Oi, O2 and D terminated. 



Experimental values at 100(X — Xo)/Xo 



-6% 



■3% 



20.3 

 24.0 

 3.50 



1.20 



■3.5m 

 •3.5(02) 



48.5 

 47.7 

 .66 



+3% 



77 



+6% 



19.7 

 22.2 

 2.20 



Comparison Between Theory and Experiment 



From the experimental results, we can now cite in support of the theory 

 the following areas of agreement between theory and experiment, at the 

 design wavelength: 



Ring Type and Property 



Case A: if X; Three Arms _ _ • 



Relative power at Oi and O2 for input at /. 



Impedance match (SWR) 



Observed center wavelength versus mean annulus 

 perimeter guide wavelength _ _ _ 



Transmission loss (Isolation) from Oi to O2. / ter- 

 minated. 



Relative power at Oi and O2 for input at / 

 Impedance Match (SWR) _ _ _ 



Transmission Loss (Isolation) 5 to D. 0% and O2 



terminated _ _ _ 



Transmission Loss (Isolation) Oi to O2. D and / 



terminated 



Theory 



-3db 

 Odb 



Experiment 



-3.6db 

 .84db 



Agreement to about 1% 



6.0 db 



-3db 

 Odb 

 Conjugacy 



Conjugacy 



6.0 db 



-3.5 db 

 .66db 

 47.7 db 



48.5 db 



