An ultralow profile, dual-wideband and low passive intermodulation (PIM) in-building ceilingmount antenna for long term evolution (LTE) distributed antenna system (DAS) application is presented. The proposed antenna was designed based on asymmetrical dipole concept having a ground plane with an inclined feeding edge to achieve wideband characteristic and reduced null radiation pattern in the azimuth plane when oriented horizontally. Various dipole and monopole design approaches are presented to give an insight into the typical elevation dipole-liked radiation pattern in the azimuth plane when oriented horizontally to achieve ultralow profile feature. The proposed antenna improves from a simple rectangular monopole to a newly innovated design with off-center feeding location and radiating elements by implementing new design features, e.g. having variation between edges of the radiator and ground plane, slots within monopole radiator and ground plane and inclination of the feeding edge of the ground plane. These additional features enable the proposed design to have a good compromise between the azimuth plane radiation pattern and impedance matching. A production-quality prototype was fabricated to ensure the best PIM performance is achievable. The performance of the prototype was measured. The antenna offers dual-wideband characteristic covering most of the LTE frequency ranges of 698-960MHz and 1350-3800MHz. The passive intermodulation levels that measured for both 700MHz and 1920MHz bands are better than-150 dBc at carrier input of 2 × 20 Watts. INDEX TERMS Broadband antennas, dipole antennas, antenna radiation patterns.
Kertas kerja ini menyampaikan antena mikrostrip tampal baru berjalur lebar bentuk hibrid E–H tersongsang tersuap prob–L (LIEH) yang merangkumi jalur International Mobile Telecommunications – 2000 (IMI–2000). Reka bentuk ini menggunakan teknik terkini; penyuapan prob–L struktur tampal tersongsang dengan substratum udara, dan tampal penyinar beralur. Kesan komposit dengan mengintegrasi teknik ini dengan penggunaan bentuk tampal hibrid E–H, menawarkan ciri–ciri berprofil rendah, berjalur lebar luas, gandaan tinggi, pengutuban silang rendah, dan elemen antena yang padat. Keputusan pengukuran adalah memuaskan dengan pencapaian lebar jalur 17.20% pada kehilangan kembali 14 dB (SWR = 1.5), gandaan maksimum 8 dBi dengan variasi gandaan 1 dB, dan pengkutuban silang 23 dB di bawah aras cuping utama. Tampal LIEH mempunyai dimensi yang padat iaitu 79 × 41 mm2. Reka bentuk ini sesuai bagi aplikasi tatasusun terutamanya bagi antena stesen tapak IMT–2000. Kata kunci: IMT-2000, antena jalurlebar luas, antena tampal mikrostrip, antena tampal bentuk E-H, suapan prob-L This paper presents a novel wideband L–probe fed inverted hybrid E–H shaped microstrip patch antenna (LIEH) covering the International Mobile Telecommunications – 2000 (IMT–2000) band. The design adopts contemporary techniques; L–probe feeding, inverted patch structure with air–filled dielectric, and slotted patch. The composite effect of integrating these techniques and introducing the novel E–H patch shaped offers a low profile, broadband, high gain, low crosspolarization, and compact antenna element. Measurement result showed satisfactory performance with an achievable bandwidth of 17.20% at 14 dB return loss (SWR = 1.5), maximum achievable gain of 8 dBi with 1 dB gain variations, and crosspolarization level of 23 dB below the main lobe level. The LIEH patch has a compact dimension of 79 × 41 mm2. The design is suitable for array applications especially for IMT–2000 base station antenna. Key words: IMT-2000, broadband antenna, microstrip patch antenna, E-H shaped patch antenna, L-probe fed
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.