Push-pull radio-frequency power splitter/combiner apparatus

Details Push-pull radio-frequency power splitter/combiner apparatus Push-pull radio-frequency power splitter/combiner apparatus

1985-03-25

1987-03-03

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including distributed parameter-type coupling

330295, 330124R, 333117, 333119, 333124, 333136, 333 25, H03F 360, H03H 748

Patent

active

046478680

ABSTRACT:
A four-way power splitter/combiner apparatus comprises five unbalanced ports, configured as a common port and four other ports, with power introduced into the common port, over a relative wide frequency band, being substantially equally divided between the four other ports, and vice versa. Each of the first and second ports of each pair of the four other ports has a substantially in-phase signal thereat, with the first in-phase pair of ports having a substantially 180.degree. signal phase difference from the substantially in-phase signals at the other pair of ports. Each of the balun and 2-to-1 transformers of the push-pull 4-port apparatus can be fabricated of a magnetically-decoupled coaxial cable assembly, wherein the cables are all of the same characteristic impedance as the load impedance magnitude at each of the five ports.

REFERENCES:
patent: 3103638 (1963-09-01), Greuet
patent: 3181087 (1965-04-01), Almering
patent: 3735289 (1973-05-01), Bruene
patent: 4121180 (1978-10-01), Greenway
Basset, Raymond; "Three Balun Designs for Push-Pull Amplifiers"; Microwaves; vol. 19, No. 7, Jul. 1980; pp. 47-52.
AN-749, "Broadband Transformers and Power Combining Techniques for RF", H. Granburg, in Motorola RF Data Manual, 3rd Ed., 1983, pp. 4-145 to 4-153.
MRF154 Data Sheet, FIG. 5, Motorola Semiconductors, 1985.

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