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3 dB 90° Hybrid couplers

3dB hybrid couplers and directional couplers are passive devices used in microwave field. Directional coupler is a reciprocal 4 port device. When a signal is applied to its input port, it provides 2 amplitude ports, coupling is the ratio in dB of the incident power fed into the input port of the main line of the directional coupler to the coupled port of the secondary line when all ports are terminated on matched load.
A 3db Hybrid coupler is a special class of directional couplers in which signals at the two outputs are equal to split RF signal in 2 equal parts or to combine 2 RF signals on one port.



Frequency (GHz) Amplitude Balance (dB) Phase Balance Input Power (W) Max Insertion Loss(dB)
Attenuation (dB)
Min Isolation(dB) VSWR max. Connectors main / coupled Part Number
Ave.(1) Peak (2)
0.15 - 0.3 ± 0.5 90˚ ± 0.5˚ 500 5,000 0.3 30 1.15 N f / N f R432 171 000
0.25 - 0.5 ± 0.5 90˚ ± 5˚ 500 5,000 0.3 30 1.15 N f / N f R432 271 000
0.5 - 1 ± 0.5 90˚ ± 0.5˚ 300 5,000 0.3 25 1.15 N f / N f R432 371 000
1 - 2 ± 0.5 90˚ ± 5˚ 100 3,000 0.3 25 1.2 SMA f / SMA f R432 431 000
1 - 2 ± 0.5 90˚ ± 5˚ 200 5,000 0.3 23 1.2 N f / N f R432 471 000
2 - 4 ± 0.5 90˚ ± 5˚ 80 3,000 0.3 23 1.2 SMA f / SMA f R432 531 000
2 - 4 ± 0.5 90˚ ± 5˚ 80 3,000 0.3 20 1.2 N f / N f R432 571 000
4 - 8 ± 0.5 90˚ ± 5˚ 50 3,000 0.3 19 1.25 SMA f / SMA f R432 631 000
7 - 12,4 ± 0.5 90˚ ± 6˚ 30 3,000 0.4 18 1.35 SMA f / SMA f R433 721 000
6 - 18 ± 0.6 90˚ ± 6˚ 30 3,000 0.6 15 1.5 SMA f / SMA f R433 611 700
12,4 - 18 ± 0.7 90˚ ± 6˚ 30 3,000 0.6 16 1.4 SMA f / SMA f R433 831 000

(1) at 25°C
(2) at 25°C (1us - duty cycle 1%)

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