Developed by ZDTECH, the ZD021804 planar spiral antenna array is a high-performance antenna product covering a wide frequency range of 2GHz~18GHz. It adopts right-handed circular polarization, which can meet the signal transmission needs of multiple scenarios. In terms of core performance, the antenna gain increases accurately with the frequency band: gain ≥-7dBi above 2GHz, ≥-2dBi above 3GHz, ≥1dBi above 4GHz, and up to ≥4.5dBi at 9-10GHz. At the same time, it has excellent signal stability, with a standing wave ratio ≤2.5, back lobe suppression ≤-10dBc, and the beam width of different frequency bands remains ≥90° (corresponding to different gain thresholds), ensuring signal coverage and transmission quality.
In terms of structure and environmental adaptability, the product has a reference dimension of ≤55mm×55mm×40mm (excluding the SMA-50K stainless steel socket) and a weight of ≤50g, which is compact, lightweight and easy to integrate. The antenna cavity is made of Alufer material, combined with a "grayish sea" appearance, which has both durability and aesthetics. It has excellent environmental tolerance, with an operating temperature range of -40℃~+55℃ and a storage temperature of up to -55℃~+70℃, which can operate stably in complex temperature and humidity environments. It is suitable for fields such as communication equipment and testing instruments that have high requirements for antenna frequency bands, size and reliability.
Technical Index
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Frequency Range
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2GHz~18GHz
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Beam Width
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≥90°@2GHz above (beam width with absolute gain greater than or equal to-10dBi)
≥90°@3GHz (beam width with absolute gain greater than or equal to-5dBi)
≥90° at 4 GHz (beam width with absolute gain ≥-4 dBi)
≥90°@9, 10GHz (beam width with absolute gain greater than or equal to-1.5dBi)
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Standing Wave
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≤2.5
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Back Lobe
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≤-10dBc
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Joggle
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SMA-50K (stainless steel)
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Gain
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≥-7dBi@2GHz above;
≥-2dBi at 3GHz or higher;
≥1 dBi at 4 GHz or higher;
≥4.5dBi@9GHz, 10GHz above
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Polarization Method
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right-handed circular polarization
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Reference Dimension
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≤55mm*55mm*40mm (excluding socket)
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Weight
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≤50g
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Pigment
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Grayish sea
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Antenna Cavity Material
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Alufer
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Working Temperature
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-40℃~+55℃
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Storage Temperature
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-55℃~+70℃
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Beam Width
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service frequency（GHz）
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3dB beam width（°）
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2
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84.5
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4
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87.1
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6
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73.1
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8
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66.4
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10
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64.8
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12
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84.1
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14
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55.9
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16
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85.3
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18
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86.5
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