5G millimeter wave LTCC parallel-feed wide-angle scanning phased array

Abstract

The invention provides a 5G millimeter wave LTCC parallel-feed wide-angle scanning phased array, and the phased array comprises a plurality of areas, a plurality of dielectric resonant cavities are formed in the inner side surrounded by metalized via holes in a first area, and extra metal covering type metal layers are arranged in the areas, between the metalized via holes and the dielectric resonant cavities, of an uppermost substrate layer in the first area; at least two radiation units are arranged on the uppermost substrate layer in the second area, each radiation unit comprises a plurality of radiation slots, the corresponding two radiation slots of the adjacent radiation units are located in the same space defined by the metalized via holes, and the two radiation slots are not located in the same straight line; and the other side of each radiation slot in the space is provided with a metal matching hole for disturbing the distribution of a field. Through the I-shaped slot and the metal matching hole structure, the matching of a common slot antenna is improved, and the additional metal covering type metal layer is arranged to change the aperture field distribution, so the wide-angle scanning is realized while the gain is ensured.

Description

technical field [0001] The invention relates to the field of antennas of electronic communication technology, and provides a 5G millimeter wave LTCC and feed wide-angle scanning phased array. Background technique [0002] In recent years, millimeter wave technology has increasingly shown great application value in military, civil and industrial fields, especially for the emerging fifth / sixth generation mobile communication (5G / 6G) and vehicle millimeter wave radar technology, which has become a wireless An important direction of technological development. Antennas are essential components in wireless systems, and scanning phased array antennas (referred to as phased arrays) are an important type of antenna. Phased arrays can change the direction of high-gain beams or form specific beam shapes according to needs, which are of great value to millimeter wave communication (including 5G / 6G), radar, imaging and detection systems. According to the dimension of beam scanning, pha...

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Problems solved by technology

[0004] J.Xu et al. in "Bandwidth Enhancement for a 60GHz Substrate Integrated Waveguide Fed Cavity Array Antenna on LTCC, in IEEE Transactions on Antennas and Propagation, vol.59, no.3, pp.826-832, March 2011, doi:10.1109 / TAP. 2010.2103018", proposed a parallel-fed multi-layer SIW slot antenna based on LTCC technology. This antenna is designed based on the parallel-feed feeding scheme, and has good beam stability and wide bandwidth; but at the same time, the antenna's The number of layers is too high, the number of units is too large, and only an array of fixed beams is made

[0005] At present, there are three main methods to improve the scanning capability of phased arrays: 1. Increase the unit beam width: by improving the beam width of the antenna unit to achieve a wider beam coverage; 2. Reduce the unit spacing: by reducing the column unit 3. Reduce unit mutual coupling: The mutual coupling between units will greatly affect the pattern of the array, and the direction is maintained by reducing the unit mutual coupling The stability of the graph thus obtains a high scanning angle; the above method of improving the scanning ability of the scanning phased array is mainly used in the microwave frequency band, but it is difficult to apply in the millimeter wave frequency band, because: (1) the wavelength of the millimeter wave is short, and some structures require processing High precision, which cannot be guaranteed by the current packaging process; (2) The packaging process is basically a planar circuit process, with limited processing freedom

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