Christmas-tree shaped compact microstrip textile antenna for Telemetry, ISM and X-band applications

This work presents the development of a Christmas-Tree shaped textile monopole antenna. The radiating element of the propounded textenna appears like a Christmas-tree-shaped element, and a detective ground structure supports the primary radiating element. The proposed miniature antenna had dimensions of 30x20 mm2 with a thickness of 1 mm. It is developed on polyester material with a dielectric value of 1.05, and the conductive layers are actualized using the adhesive copper conductive. To excite the antenna, a 50-ohm microstrip feedline is used, enabling it to operate treble frequencies of 4.5, 5.5–7, and 8 GHz in Telemetry, ISM, and X wireless application bands. These operating bands were accomplished by inducing the triangular projections on both sides of the main radiating triangular patch structure. A prototype is built on the polyester material, and its functionality was confirmed in an anechoic chamber. The measured results are with a decent match with the HFSS simulations. The developed antenna has good radiating efficiency and gain, which are the foremost requirements to assess the performance of the proposed antenna in the operating ranges.