Triple band-notched UWB antenna using electromagnetic bandgap (EBG) structure

Abstract

A triple band-notched UWB antenna with increased capacitance and inductance is provided for a variety of applications. A triple band-notched UWB antenna 100 includes a ground plane 102 having two radiating patches 104A, 104B arranged adjacent to electromagnetic bandgap (EBG) structures 106A, 106B, respectively, and the antenna 100 provides increased capacitance and inductance due to the location of the EBG structures 106A, 106B.

Description

[Technical field]

[0001] The present invention relates to the field of ultra-wideband (UWB) antennas, and more particularly to a band-notched UWB antenna using an electromagnetic bandgap (EBG) structure. [Background technology]

[0002] Ultra-wideband (UWB) technology plays an important role in short-range, high-speed indoor data communication systems. The Federal Communications Commission has designated the frequency band from 3.1 to 10.6 GHz for UWB systems, which have been widely adopted in wireless communication technologies to improve data rates. Monopole antennas are well suited for UWB applications due to their advantages of easy fabrication, acceptable radiation pattern, and wide bandwidth.

[0003] However, in certain narrowband applications such as WiMAX (3.3-3.6GHz), WLAN (5-6GHz), and X-band uplink satellite communication bands (7.9-8.4GHz), they cause interference that disrupts UWB functionality. To address such issues, electromagnetic bandgap (EBG) structures are employed. EBG structures are designed to form a stop band that effectively blocks electromagnetic waves within a specific frequency band. This is achieved by forming a finely patterned array of small metallic patches on a dielectric substrate.

[0004] The main objective is to develop a single EBG structure that can eliminate interference from these three narrow bands within the UWB range. However, such an approach aims to suppress the ingress glitches caused by narrow band applications, thereby optimizing the performance of UWB technology in various communication scenarios. Another way to eliminate narrow bands from the ultra-wideband (UWB) range is to introduce slots of various shapes and sizes into the radiating patch. However, such a technique may introduce distortions in the radiation pattern.

[0005] Therefore, an alternative is needed to obviate the aforementioned objectives. Summary of the Invention

[0006] The present invention discloses a triple band-notched UWB antenna 100 comprising a ground plane 102 having two radiating patches 104A, 104B arranged adjacent to electromagnetic band gap (EBG) structures 106A, 106B, respectively, and locating the EBG structures 106A, 106B close to the feed line of the UWB antenna 100 to realize a triple band-notch that increases the capacitance and inductance of the UWB antenna 100. Effect of the Invention

[0007] The present invention disclosing the triple band-notched UWB antenna 100 has the advantage of increasing the capacitance and inductance so that the UWB antenna 100 can be used for various applications such as data transmission, location identification, sensing, tracking, and the like. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of a triple band-notched UWB antenna 100 of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] The present invention discloses a triple band-notched UWB antenna 100. The UWB antenna 100 includes a ground plane 102 having two radiating patches 104A, 104B. The radiating patches 104A, 104B are arranged adjacent to electromagnetic band gap (EBG) structures 106A, 106B, respectively. The EBG structures 106A, 106B are located near the feed line of the UWB antenna 100 to achieve triple band-notching. The equivalent values ​​of inductance and capacitance are increased by etching slots in the EBG structures 106A, 106B and increasing the number of vias. Within the EBG structures 106A, 106B, the term "via" refers to a conductive path that establishes a connection between different layers or regions of the structure. As shown in FIG. 1, the EBG structures 106A, 106B include two vias that connect the radiating patches 104A, 104B to the ground plane 102. To make a more compact UWB antenna 100, the equivalent values ​​of capacitance and inductance need to be increased. This increase in capacitance and inductance values ​​is achieved through specification changes. Slots are etched into the EBG structures 106A, 106B and the number of vias is increased. Therefore, the UWB antenna 100 realizes a triple band notch. 2 Such an antenna 100 exhibits low correlation of less than 0.005 in all frequency bands except for the 3.3-3.6 GHz, 5-6 GHz, and 7.9-8.4 GHz ranges where the ECC increases to 0.15. The diversity gain is measured to be 9.98 dB. [Industrial Applicability]

[0010] The present invention is useful for data transmission, location identification, sensing, tracking, etc.

Claims

[Claim 1] A triple band notched UWB antenna 100, A ground plane 102 having two radiating patches 104A, 104B; The two radiation patches 104A and 104B are arranged adjacent to electromagnetic bandgap (EBG) structures 106A and 106B, respectively; The triple band notched UWB antenna 100 achieves a triple band notch that increases the capacitance and inductance of the UWB antenna 100 by placing the EBG structures 106A, 106B close to the feeder line of the UWB antenna 100.

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