Bandwidth and directivity enhancement of an internal folded monopole antenna loaded by interdigital capacitor for ultra‐high‐definition television applications

Abstract

An internal antenna with bandwidth and directivity enhancement was developed for operation in ultra‐high‐frequency bands (UHF: 470‐771 MHz, bandwidth: 48.5%) for ultra‐high‐definition television (UHD‐TV) applications. The antenna is integrated into a 49‐in. TV model, which is surrounded by a bezel frame made of polycarbonate‐acrylonitrile butadiene styrene (PC‐ABS) plastic. This material was also used as a substrate in fabricating the antenna. The antenna has a compact size of 0.387λL × 0.023λL × 0.0093λL (where λL is the wavelength at the lowest operating frequency) and is fed by a 50 Ω coplanar waveguide (CPW) feedline. To achieve wideband operation and directional radiation, the proposed internal antenna was designed on the basis of a folded monopole antenna loaded with parasitic strips and an interdigital capacitor. The experimental results showed that the antenna exhibits a wide impedance bandwidth of 86% (400‐1000 MHz) under the criterion |S11| ≤ −6 dB (Voltage Standing Wave Ratio (VSWR) ≤ 3), a directional radiation pattern with a maximum realized gain of 5.2 dBi, and a radiation efficiency of more than 68%. These findings indicate that the antenna is suitable for UHD‐TV applications.

Systemic Overview of Microstrip Patch Antenna’s for Different Biomedical Applications

“…107 Three receiving wires are structured dependent on the capacitively stacked circle (CLL), 108 corresponding split ring circle (CSRL), 109 and interdigital capacitor circle (IDCL). 110 To research if the dielectric properties of CSF are an element of age, in vitro estimations of various CSF from pigs with different ages are estimated in the sub-1-GHz band (0.1-1 GHz). The outcomes uncover a strongpairwise relationship surpassing 0.77 for permittivity and 0.83 for conductivity among tests.…”