آنتن آرایهای شکافی قطبش دایروی پهن باند جهتدار با شبکه تغذیه تزویجگر هایبرید

رضایی, پژمان; موسوی راضی, زهزا

آنتن آرایهای شکافی قطبش دایروی پهن باند جهتدار با شبکه تغذیه تزویجگر هایبرید

نویسندگان

¹ سمنان

² دانشگاه سمنان

چکیده

در این مقاله ساختار جدیدی از آنتن آرایهای شکافی قطبش دایروی پهن باند با بهره بالا که با شبکه ترویج گر هایبرید متقارن تغذیهشده، در باند C معرفی شده است. عنصر منفرد آرایه پیشنهادی به فرم نواری L شکل با پهنای کاهش یافته مخروطی شکل واقع در روبروی شکافیدر صفحه زمین میباشد. براساس نتایج شبیهسازی، پهنای باند عنصر منفرد آرایه در بازه فرکانسی GHz 5/55 الی GHz 11/3 در حدود GHz 8/01% میباشد که در مقایسه با عناصر آرایه گزارش شده پیشین از افزایشی در حدود 53 برخوردار است. ساختار نهایی آنتن پیشنهادی شامل آرایه ای5 میباشد. نتایج اندازهگیری نشان میدهد که آنتن آرایهای شکافی طراحیشده دارای پهنای باند امپدانسی 55 % در بازه ×5 GHz 3/5 الی GHz 9/5همراه با پهنای باند قطبش دایروی در حدود 55 % در بازه GHz 5/5 الی GHz 5/5 با بیشینه بهره dBic 15/55 در فرکانس GHz 5/5 میباشد.ساختار ساده، سبک، ابعاد فشرده، قطبش دایروی با خلوص قطبش مناسب و بهره بالا، این آنتن را گزینه مناسبی برای کابردهای قطبش دایروی درباند C قرار داده است. نتایج اندازه گیری آنتن از تطابق مناسبی با نتایج شبیهسازی برخوردار می باشد.

کلیدواژه‌ها

20.1001.1.26455153.1395.4.1.6.8

عنوان مقاله [English]

Broadband and High Gain Circularly Polarized Slot Array Antenna with Hybrid Coupler Feed Network

چکیده [English]

In this paper, a new design of a broadband high gain circularly polarised slot array antenna (CPSSAA) is presented. The proposed antenna is fed by a symmetric hybrid coupler for C-band application. The designed single array element is excited by L-shaped strip with a tapered end, located along the circular-slot diagonal line in the back plan. From the single array element simulation results, the -10dB return loss bandwidth is around 8.79GHz (2.51GHz-11.3GHz). The designed single array element is 50% wider than the impedance bandwidth of a previous similar design. The proposed antenna is composed of 2 × 2 Array elements. The measured results for The final structure of circularly polarised slot array antenna are about 54% (3.5GHz-6.5GHz) for return loss BW, 22% (4.4GHz-5.4GHz) for axial ratio and peak Gain around 12.45dBic at 5.5GHz. The simple structure, light weight, compact size, circular polarization with a very high polarization polarity and a high gain, make it a perfect match for C-band applications, in which a circular polarization antenna is required. The measured results corroborate well with the simulated results.

کلیدواژه‌ها [English]

Slot Array Antenna
Circularly Polarised
Broadband
High Gain and Hybrid Coupler

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