Abstract
In order to meet the need of multiband and antenna-in-package (AiP), a compact dual-frequency antenna with a partial ground and linear structure is proposed, optimised and realised. The proposed antenna was designed at 2.4 GHz and 5.8 GHz bands for WLAN applications. The total size of the antenna is 20 mm × 20 mm, equals to 0.27 λg1 × 0.27 λg1 and 0.65 λg2 × 0.65 λg2 (λg1, λg2 are the microstrip (with ground) guiding wavelengths at 2.4 GHz and 5.8 GHz) or 0.15 λ01 × 0.15 λ01 and 0.38 λ02 × 0.38 λ02 (λ01, λ02 are the wavelengths in the atmosphere at 2.4 GHz and 5.8 GHz). Also, omnidirectional radiation characteristics in the desired bands can be obtained.
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