Let's talk about the difference between combiners and hybrid
2023/08/22
Circuit combiners are divided into two types: dual-band combiners and hybrid combiners. Dual-band combiners are divided into GSM/CDMA two-network combiners and GSM/DCS two-network combiners. Working mechanism description: The working principle of the dual-frequency combiner is similar to the diplexer, but the synthesized signal is not in the same frequency range, such as G network and C network, G network and D network, there is a combination between C network and D network can use duplex combiner, and dual-frequency combiner has the characteristics of low insertion loss (some only a few tenths of a dB) and large isolation (greater than 70~90dB). Since the second harmonic of the C network falls within the D network, the isolation of the C network and the D network is about 10 dB less than that of other kinds. When the signal being merged is in the same frequency band, only the hybrid combiner can be used. The hybrid combiner has a merging loss, such as 2-in-1 has a 3dB combining loss, and the isolation of the hybrid combiner is much lower than that of the duplex combiner, generally only about 20dB. The difference between the hybrid and the combiner is insertion loss, isolation degree, and cost. The insertion loss of the hybrid is 3dB, and the insertion loss of the combiner is generally less than 1.5dB. The isolation of combiners is much higher than that of hybrid couplers, and the price is also high. It should be because there is more than one filter in the combiner.
