▎ 摘　　要

NOVELTY - The antenna has a flexible film substrate (100) whose upper surface is provided with a first upper surface floor (101) and an inverted F-shaped circular arc antenna structure with arc-shaped periphery. The flexible film base (110) is formed with a feeding port, where the inverted F arc antenna structural is formed as a circular arc line edge as a main radiating unit. A first line edge is connected at an end of the circular arc edge and a second line edge that is connected in a middle of an arc edge. The first and second line edges of the inverted arc antenna structures are connected to the first and the second upper surface floors. The arc line edges are connected with the feeding port. The circular arc edges on both sides of an inverted arc line surface are arranged to extend along the arc edge periphery of the first floor. USE - Flexible antenna used in an electrocardiogram patch of a wearable electronic and a human body for realizing health real-time detection and healthy large data acquisition and realizing information communication transmission to a fifth generation (5G) network and a mobile phone. ADVANTAGE - The flexible antenna improves the comfort of the electrocardiogram of the intelligent wearable device, but also has high tensile and bendable deformation performance, good anti-interference performance, very suitable for application on the surface of the human body. The antenna has compact design, small volume, high integration degree, batch and low cost manufacturing. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: 1. An electrocardiograph, which comprises flexible antenna, where the floor of the flexible antenna is used as the electrode for measuring the electrocardiogram. 2. A wearable device, which comprises electrocardiogram. 3. A method for preparing the flexible antenna, which involves using the mould to print nano silver paste or metal liquid the surface of the flexible film substrate by screen printing, after curing, forming the floor and the inverted F arc antenna structure, directly processing the floor and the inverted F circular arc antenna structure on the single-layer graphene nano material film by laser processing, evaporating the metal film of the nano thickness on the flexible film substrate, and then etching to process the floor and the inverted F-shaped antenna structure and forming the floor and the inverted F-shaped antenna structure on the flexible film substrate through the nano-imprinting process. DESCRIPTION OF DRAWING(S) - The drawing shows a flexible film substrate of the inverted F arc antenna structure with the first integrated mode of the electrocardiogram two examples. Flexible film substrate (100) First upper surface floor (101) Second upper surface electrode plate (102) Floor (103) Reverse f-shaped circular arc antenna structure (105) Coaxial feed port (106) Inverted f circular arc antenna structure (107) Flexible film substrate (110)