The intensive radiation array is fixed by a certain lateral pitch Dx and the longitudinal pitch DY group array in the middle, and the design needs to consider the following factors:
(1) The structure of the radiation unit; the required miniaturization design of the radiation unit is suitable for the intensive group array; the feed and mounting structure of the radiation unit need to match the power network, which is installed; from the purpose of reducing the weight of the antenna The radiation unit needs to perform a lightweight design; from increasing antenna production efficiency, the radiator can best achieve integrated design of the radiator and the feed sheet. As shown in Fig. 2 (a), it is a commonly designed aluminum alloy half-wave vibrator, the vibrator substrate is aluminum alloy die casting, the radiator, and the feed sheet separation, the radiator and the feed sheet are fixed to the power distribution network by welding. As shown in FIG. 2 (b), a 3D-MID technology (full name Three -dimensional Molded Interconnect device, Chinese name 3D molding interconnection) is used as shown in Fig. 2 (b). Device, referred to as a common circuit, processed by LDS (full name laser direct construction, Chinese name laser direct molding) process, which has light quantization (30% of the weight of aluminum alloy), radiant feed The characteristics of high-symmetrical natural, high assembly efficiency are ideal for large-scale antenna applications.
Figure 2 (a) Aluminum alloy half-wave vibrator
Figure 2 (b) LCP microstrip vibrator
(2) Radiation unit array mode; 5G large-scale antenna to achieve service beam scan of -60 ° to +60 °, the lateral unit spacing is <0.55λ, otherwise="" the="" scan="" angle="" is="" not="" enough="" and="" near="" the="" nearby="" at="" angular="" scans,="" the="" sub-valve="" level="" is="" too="" high,="" even="" higher="" than="" the="" main="" valve="" level.="" the="" gain="" decision="" of="" the="" number="" of="" units="" of="" intensive="" arrays="" and="" longitudinal="" pitch="" large-scale="" antenna="" systems="" require.="" considering="" the="" number="" of="" radiation="" units="" of="" the="" vertical="" assignment="" and="" the="" cell="" module,="" the="" longitudinal="" pitch="" of="" the="" large-scale="" antenna="" is=""><0.8λ. figure="" 3="" shows="" a="" intensive="" array="" composed="" of="" 96="" lcp="" bipolar="" microstrip="" radiation="" vibrators.="" figure="" (3)="" 96="" unit="" intensive="" array="" (3)="" decoupling="" design;="" intensive="" radiation="" array="" due="" to="" the="" number="" of="" units,="" the="" lateral="" unit="" spacing="" is="" near=""><0.55λ), the="" interpatch="" between="" each="" unit="" module="" is="" very="" large,="" resulting="" in="" the="" direction="" of="" the="" direction="" of="" the="" radio="" frequency="" channel,="" the="" consistency="" difference,="" isolation="" resulting="" deteriorate.="" therefore,="" the="" dense="" array="" is="" to="" be="" decoupled,="" and="" there="" is="" a="" set="" decoupling="" device="" between="" the="" 96="" unit="" intensive="" arrays="" shown="" in="" fig.="" (3).="" fig.="" 4="" (4)="" shows="" the="" front="" and="" rear="" changes="" of="" the="" channel="" direction="" map="" before="" and="" after="" decoupling="" design.="" improve="" the="" horizontal="" semi-power="" beam="" width="" span="" of="" the="" front="" cell="" element="" 33.8-75="" °,="" and="" the="" direction="" of="" the="" direction="" is="" deformation,="" the="" improved="" element="" level="" half-power="" beam="" width="" span="" is="" 85-96="" °,="" the="" convergence="" is="" better,="" the="" direction="" map="" curve="" becomes="" smoothing="" .="" figure="" 4="" (a)="" decoupling="" forehead="" figure="" 4="" (b)="" decoupling="" the="" diagram="">
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