A compact asymmetric coplanar strip (ACS)‐fed ultra‐wideband (UWB) monopole antenna with extra Bluetooth band for various wireless applications is presented. The proposed antenna is composed of a modified ACS‐fed structure and a staircase‐shaped patch for covering the UWB band (3.1–10.6 GHz), which occupies a very compact size of 32.5 × 10 mm 2 . By etching a snake‐shaped slot in the staircase‐shaped patch, an additional band can be realised covering the Bluetooth band (2.4–2.484 GHz). Furthermore, the proposed antenna has been fabricated and measured, and good results obtained. The proposed antenna shows nearly omnidirectional radiation characteristics, relatively consistent group delays and stable gains in the operating bands. The simple feeding structure, compact size and uniplanar design make it easy to be integrated within portable devices for wireless communication.
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Liu et al. (2014) studied this question.
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