In this letter, the one-twelfth mode of equilateral hexagonal substrate integrated waveguide (TMSIW) is proposed for the first time.Comparing with traditional substrate integrated waveguide (SIW), the size of TWSIW is only 1/12 which is reduced 11/12 while the resonant frequency of TWSIW is almost unchanged. Loading a complementary split-ring resonator (CSRR) structure, the miniaturization is further improved and the filter selectivity is improved. The filter design uses two of TWSIW which is connected with a microstrip line. The structure is not complex, easy to process, low loss, and the passband has a certain bandwidth. After processing and testing, it shows that the measurement results of filter give good agreement with the simulation results. This filter has advantages in all indexes by comparing with other works.

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The radar jamming technology has been studied in this paper mainly, which uses the antenna synthetic wave to generate phase distortion at the signal reception to carry out angle measuring jamming, such as traditional cross-eye jamming. However, cross-eye jamming has a strict parameter tolerance. In order to improve the tolerance range of phase parameters, a multiple antennas synthetic false target electromagnetic jamming technique is proposed in this paper, which has wider phase parameter tolerance and jamming range. This jamming method can be regarded as an improved cross eye jamming. We can conclude that this method can generate a "false target" in space and far away from the carrier which has jamming system, which mislead the radar to point to "false target" rather than to real targets. The jamming system with three jamming antennas is taken as the research object. The position of "false target" can be controlled casually by adjusting the feed amplitude and phase of the three antennas simultaneously. The jamming mathematical model of synthetic false target with three antenna emitters is constructed under the sum and difference channel transceiver mechanism of radar in this paper. The error angle and the synthetic gain of three jamming antennas are derived. The phase parameter tolerance of proposed method is obtained, and compared with the cross-eye jamming. Rigorous mathematical derivation has been proposed in this paper, the superiority of multiple antennas synthetic false target jamming method has been verified eventually.

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