| With the rapid evolution of frontier theory and technology of network-electromagnetic space,theory and technology of space radio wave emission,propagation and reception have made a series of significant progresses,especially the development of spatial electromagnetic wave guided control theory and technology.A large number of new concept theories and application achievements have been obtained,such as electromagnetic metasurfaces,space-plane circuit direction filtering,frequency filtering,polarization filtering,power limiting filtering,timing control,stealth multispectral comprehensive defense,etc.,which have broken through many important theoretical and technical problems of space electromagnetic wave guided control.Based on the basic theory of space planar circuit,this paper studies the theoretical method and application of space electromagnetic wave guided control,and constructs the realization path,technical method,topological structure and typical application of electromagnetic space security and defense with four-dimensional control of guided wave time,frequency,polarization and power under the condition of space planar circuit;The power limiting filtering mode of “low-power conduction and high-power shielding” and the covert transceiver communication mode are proposed and established.It breaks through the major problem of the same frequency interference between 5G communication and satellite communication,provides disruptive technical methods,and opens up a new field of directional filtering;The comprehensive calculation method of polarization-dependent coupling matrix and power-dependent coupling matrix proposed in this paper has universality and practicability for general space planar circuit structure;The research contents and main innovations are as follows:1.The concepts,theories and computational analysis methods of polarization coupling matrix and power coupling matrix are put forward and established,and the realization path,technical method,topological structure and typical application of electromagnetic space security and defense with four-dimensional regulation of guided wave polarization,power,frequency and time under the condition of space planar circuit are constructed.Based on the filter coupling matrix,the topology,physical and mathematical models and simulation calculation methods of N+2 order polarization-dependent coupling matrix,N+2 order power-dependent coupling matrix and multiport multi-mode network coupling matrix are further proposed and studied.Numerical simulation examples are used to verify the correctness and effectiveness of polarization-dependent coupling matrix and power-dependent coupling matrix.The comprehensive calculation method based on polarization coupling matrix and power coupling matrix proposed in this paper has universality and practicability for general space planar circuit structures.2.The frequency coupling matrix based on the topology of the third-order planar circuit is created,and the theoretical synthesis method of the third-order frequency filter coupling matrix of the space planar circuit realized by frequency selective surface is proposed and established,and a number of highly selective frequency selective surface circuits with full canonical filtering response are realized.Based on the third-order frequency filter coupling matrix,the network comprehensive topology is established,and the planar circuit model of cascaded dual-mode/triplemode resonator substructures is established.By using the relatively independent adjustable characteristics of resonant substructures,the independent adjustable ability of multiple transmission poles,bandwidth and center frequency with respect to frequency is obtained.Compared with the current typical advanced level(see Table 3.2),the insertion loss of the circuit designed by this method is reduced from 0.80 d B to 0.54 d B under the condition of the same number of layers,and the left and right sideband roll-off coefficients are increased to the optimal level of 2.8 times and 7.8 times respectively.3.The polarization coupling matrix based on the fourth-order/sixth-order planar circuit topology is created,and the theoretical synthesis method of the fourth-order/sixth-order polarization coupling matrix of space planar circuit realized by polarization selective surface is proposed and established.The polarization selective surface circuit with dual/quad-band cochannel interference suppression characteristics is realized for the first time.Based on the fourthorder/sixth-order polarization coupling matrix,a network integrated coupling topology is established,and a planar circuit model of cascaded f quadruple-mode/ sixfold-mode resonator substructures is established.By using the relatively independent adjustable characteristics of resonator substructures for different polarization attenuation,the dual-band and four-band polarization attenuation suppression characteristics of the same frequency are obtained.The method creates a quad-band spatial planar circuit,realizes the superior attenuation suppression characteristics between the polarization of TE waves and TM waves with the same frequency in four bands,and especially obtains the same mode and same frequency attenuation suppression isolation characteristics greater than 25 d B for TE waves or TM waves(polarization angles are between 40 degrees and 80 degrees),thus providing a subversive technical method for breaking through the major problem of the same frequency interference between 5G communication and satellite communication,and opening up a new field of directional filtering.4.The power coupling matrix based on multi-order planar circuit topology is created,the power limiting filtering mode of “low-power conduction and high-power shielding” is proposed and established,and the theoretical synthesis method of multi-order power coupling matrix of spatial planar circuit is proposed.The spatial planar circuits of power limiting filter for different applications are designed,which are between TE wave and TE wave,between TE wave and TM wave,and between TM wave and TM wave.The special functions of power limiting filtering and covert transceiver communication between the same polarization wave and different polarization waves have been achieved.An energy selective surface with covert filtering band and a limiter topology and planar circuit with multiple filtering bands are successfully developed.Excellent comprehensive performance is obtained,the center frequency are independently adjustable,and power-on threshold and power-limiting threshold is adjustable.5.The multi-port coupling matrix based on the topology of multi-port and multi-mode planar circuit is created,and the theoretical synthesis method of multi-port multi-mode coupling matrix of filter coupling circuit is established,and a series of filter coupling circuits with commonmode interference suppression characteristics are realized.Based on the multi-port multi-mode coupling matrix,the integrated topology of the network is established,and the planar circuit models of cascaded quad-mode resonator substructures are created.By using the relative independent adjustability and port correlation of resonator substructures,excellent common-mode interference suppression characteristics are obtained.Compared with the current typical advanced level(see Table 6.5),the circuit designed by this method has achieved superior performance with common mode rejection of 39 d B and port isolation of 47 d B under the condition of the same dielectric substrate. |
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