MICROWAVE HYBRID COUPLER STUDY PROGRAM
Quarterly progress rept. no. 3, 1 Nov 1961-31 Jan 1962
RANTEC CORP CALABASAS CA
Pagination or Media Count:
A general method of computing the response of an n-section TEM-mode directional coupler is given and applied to the synthesis of a five-section design. The final results were the design parameters of a five-section coupler having an equal-ripple coupling function bounded by -3.010 0.163 db over a 5. 81 to 1 bandwidth. Coupling and directivity curves are given for the onesection 1-to-2-gc coupler described previously. The mid-band coupling is -2.6 db, which is 0.1 db greater than the design value. The minimum directivity is 29 db. A new set of curves is given for the 400 to 2000 mc three-section coupler. These curves show the results of several minor changes made in the strip-line end sections of the coupler. The maximum coupling variation is now 0.5 db between 400 and 2100 mc, while the minimum directivity in that band has increased to 29 db. The results of a continuing study of waveguide broad-wall couplers are described. A configuration meeting the coupling goal of -3.0 0.5 db over the 8.2 to 12.4 gc band was achieved.
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