Dua reka bentuk antena set tangan yang diperbaiki, kecil, padat dan berjalur lebar bagi jalur 3G berdasarkan kaedah tompok gandingan–sela dan FS–PIFA dibentangkan. Antena gandingan–sela sesatah tompok tersongsang (IGCC) dan satah bumi terhingga satah tersongsang–F terpintas–penuh (FFS–PIFA) disimulasi dengan menggunakan simulator Zealand IE3D 8.2 em. Hasil simulasi memberikan pecahan lebar jalur sebanyak 28.2% dan 40.1% pada kehilangan balikan 10 dB bagi reka bentuk IGCC dan FFS–PIFA masing–masing. Reka bentuk IGCC difabrikasi kerana ia mudah difabrikasi. Hasil pengukuran bagi IGCC memberikan pecahan lebar jalur sebanyak 31% pada 10 dB pada fc = 1.95 GHz dengan gandaan 4 dBi. Dimensi tompok bagi kedua–dua antena ialah 33 × 32 mm dengan satah bumi bersaiz 40 × 60 mm. Antena ini sesuai bagi aplikasi 3G.
Kata kunci: Antena set tangan, antena tompok microstrip, satah tersongsang F, gandingan sela, IMT- 2000
Two improved, small, compact, and broadband handset antenna designs for 3G band based on gap–coupled patch and FS–PIFA techniques are presented. The antennas, the Inverted Gap–Coupled Coplanar patch antenna (IGCC) and Finite ground plane Full–Shorted Planar Inverted–F Antenna (FFS PIFA) are simulated using Zealand IE3D 8.2 em simulator. Simulation results give fractional bandwidths of 28.2% and 40.1% at 10 dB Return Loss for IGCC and FFS–PIFA respectively. The IGCC was fabricated due to its simple fabrication. Measured results for IGCC gave a fractional bandwidth of 31% at 10 dB Return Loss at fc = 1.95 GHz and with 4 dBi gain. The patch dimensions for both antennas are 33 × 32 mm with a ground plane size of 40 × 60 mm. These antennas are promising for 3G applications.
Key words: Handset antenna, microstrip patch antenna, inverted-F, gap-coupled, IMT-2000
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
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