Bi-pass band frequency selective surface

A frequency-selective surface and dual-passband technology, applied in the microwave field, can solve the problems that the geometric structure cannot correspond to the clear physical meaning, cannot be quickly and effectively designed, and the selection characteristics are not good, so as to achieve easy and fast design and save time for design optimization , select the effect of performance improvement
CN1937308AInactive Publication Date: 2007-03-28SOUTHEAST UNIV
0 Cites 17 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SOUTHEAST UNIV
Publication Date
2007-03-28
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

Frequency selection surface with dual band pass can be utilized as frequency range multiplexer to apply to antenna in multiple frequencies in comm. system of satellite, radar etc. identical periodic outer square annular slot units and periodic inner square annular slot units are etched on up and low metal surfaces of base plate so as to form periodic dual square annular slot array in two layers. A series of metalized through holes with even interval surrounding each doublelayer square annular periodic slot unit are set up on laminated base plate so as to form integrated wave-guide cavity on base plate equivalent to traditional metal cavity. Comparing with frequency selection surface in dual frequency composed of periodic patches or slots in two different sizes, the new structure introduces cavity resonance mode, realizes unilateral drooping characteristic in dual frequency so as to raise selectivity characteristic greatly, and provides good stability for angle and polarizability.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a double-pass band frequency selective surface based on substrate integrated waveguide technology, which can be used as a frequency band multiplexer, and belongs to the field of microwave technology. Background technique

[0002] Frequency selective surfaces (FSS) are widely used in engineering applications. FSS has good selectivity for the transmission and reflection of electromagnetic waves. It has all-pass characteristics for electromagnetic waves in its passband, and total reflection characteristics for electromagnetic waves in its stopband. It has a spatial filtering function. In the microwave field, FSS can be used in the frequency band multiplexer of the communication satellite system, and the communication capacity can be expanded by using multi-feed configuration. Another main use is to make radomes for shielding and stealth of radar antennas in aerospace. High performance waveguide filters can also be fabricated as ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More