Patent GB-1252696-A (GB)
IPC: H03L7/24
Filed: 1969-12-16
Abstract: 1,252,696. R.F. couplings. WESTERN ELECTRIC CO. Inc. 16 Dec., 1969 [18 Dec., 1968], No. 61116/69. Heading H4A. An H.F. power generation apparatus includes a series of individual oscillators, means for coupling a synchronizing signal to each oscillator, and means for combining the outputs of said oscillators. The combining means includes a plurality of reflective devices, each of which combines on one side thereof a signal from one of the oscillators and another signal from another or others of the oscillators, to produce a combined signal of greater power. The signals to be combined are applied in operation to opposite sides of said reflective device. As described, an apparatus comprises a master oscillator 1, Fig. 1, and four unit oscillators 2, 3, 4, 5 each of which has an output of (say) 400 mW., and is of the solid-state type. The master oscillator 1 sends power through three port circulators 6, 14 to a fixed-phase, variable-magnitude, reflective device 15 (e.g., a capacitor) which is adjusted so that 4 mW. of power is reflected back to the circulator 14, whilst 396 mW. of power passes on to a circulator 18. The 4 mW. of power is sent through the circulator 14, and through a circulator 16, to the oscillator 2, which it serves to synchronize. The output from the oscillator 2 (400 mW.) plus the synchronizing power (4 mW.), totalling 404 mW., is sent through the circulator 16, and through a circulator 17 to one side of a variable-phase, variable-magnitude reflective device 25. The 396 mW. of power from the oscillator 1 is received from the circulator 18 on the other side of the reflective device 25, which is so adjusted that of the total of 800 mW. received by it, 4 mW. is reflected back to the circulator 18, and 796 mW. is reflected back to the circulator 17. The 4 mW. of power serves to synchronize the oscillator 3, output from which is combined with that from the oscillators 1 and 2 by means of a reflective device 35. Similarly, output from the oscillator 4 is combined with that from the oscillators 1, 2, and 3 by means of a reflective device 45, and 4 mW. of synchronizing power is sent via circulators 24, 26 to the oscillator 5, whilst 1596 mW. of power is sent via circulators 23, 8 to a reflective device 55. From the oscillator 5 404 mW. are also sent to the reflective device 55, via circulators 26, 27, and said device is so adjusted that the whole power (2000 mW.) is sent via circulators 27, 9 to a load. In another embodiment, synchronizing power from a master oscillator 99, Fig. 2, is supplied to four unit oscillators 60, 70, 80, 90 via respective pairs of circulators 61, 62; 71, 72; 81, 82; 91, 92. The circulators 62, 72, 82, 92 and a terminating load 98 are serially connected, fixedphase, variable-magnitude reflective devices 67, 77, 87, 97 being interposed. Each device is adjusted so that it reflects back the appropriate amount of power for synchronizing a unit oscillator, and passes on the remainder. Output from the oscillator 60 is sent via circulators 61, 63 to a variable-phase, variable-magnitude reflective device 68, and output from the oscillator 70 is sent via circulators 71, 73 to the other side of the device 68. Said device is so adjusted that the combined outputs of the two oscillators 60, 70 are reflected back through the circulator 73. Similarly, the outputs of the oscillators 80, 90 are also included, by means of reflective devices 78, 88, and the total output is sent through a circulator 93 to a load. Specifications 1,207,140 and 1,238,740 are mentioned.