Abstract
A magnetic-free multifunction nonreciprocal device based on switched delay lines (SDLs) has been proposed in this paper. It is constructed with two double balanced gyrators (DBGs) and four baluns, each pair of differential ports of the balun connect the ports at the same orientation of the two DBGs, respectively. Due to the asymmetry of the clock control signals acting on the switches, the time reversal symmetry of the transmission line between the Gilbert quad-switch-sets (GQSS) can be broken to achieve non-reciprocity. It can be used as a circulator, gyrator, or isolator by setting different control signals. The device has infinite working bandwidth in theory based on the SDLs. Common mode interference can be better suppressed by using differential transmission structures. Moreover, power capacity can be improved compared to the previous work. Then, experiments have been done to verify the device as a circulator. Broadband property and the anti-interference property have been verified.
Highlights
In the future, wireless cellular network communication and WIFI will be further improved, the integrated full-duplex system is expected to improve the channel capacity or communication speed of wireless cellular networks and WIFI
The Gilbert quad-switch-sets (GQSS) in the double balanced gyrators (DBGs) are controlled by the clock signals
As the noise is usually generated from a single noise source, a common mode interference is added at port 1 of the differential transmission circulator of 12 (DTC), and a single noise source is added at2019, port8,1862 of the single-ended transmission circulator (STC), which is constructed by a DBG
Summary
Wireless cellular network communication and WIFI will be further improved, the integrated full-duplex system is expected to improve the channel capacity or communication speed of wireless cellular networks and WIFI. Several magnetic-free devices have been proposed to realize integration of nonreciprocal devices [5,6,7,8,9,10,11,12,13,14,15,16,17]. Commutation theory to realize magnetic-free circulators, and fabricated an integrated circulator for this design has limited power handling ability and is hard to work at millimeterwave band. This design has limited power handling ability and is hard to work at et al proposed a new kind of TVTL which is called SDL, to realize magnetic-free circulator working millimeterwave band. A magnetic-free nonreciprocal multifunction device, whichiscan be used asBesides, a circulator, circulator, gyrator, or isolator by changing the clock control signals, proposed.
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