Özetçe-Bu çalışmada, Ultra-Geniş Bant (UWB)haberleşme uygulamalarında kullanılmak üzere kelebek anten tasarımı yapılmış, ışıma örüntüsü, geri dönüş kaybı (S11) ve voltaj duran dalga oranı (VSWR) gibi parametrelerin davranışı gözlemlenerek antenin bu sistemlerdeki ışıma karakteristiği incelenmiştir. Ayrıca UWB frekans aralığında anten performansının artırılması için anten yayılma açısı, alt katman kalınlığı ve bağıl dielektrik sabiti gibi parametreler değiştirilerek en iyi performansı gösteren anten yapısı elde edilmiştir. Anten tasarımı ve modellenmesinde CST Microwave Studio programı kullanılmıştır. Anahtar Kelimeler -Ultra-Geniş Bant Sistemler; kelebek anten; anten tasarımı.Abstract-In this study, bowtie antenna is designed for Ultra-Wide Band (UWB) communication applications, and radiation characteristics of the antenna in these systems are investigated by observing the behavior of parameters such as radiation pattern, return loss (S11), and voltage standing wave ratio (VSWR). Additionally, in order to improve antenna performance in the UWB frequency range, parameters such as flare angle, substrate thickness and relative dielectric constant are changed to obtain antenna structure with the best performance. CST Microwave Studio is used for the design and modeling of the antenna.

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In this paper, a modified bowtie antenna structure is proposed for Ultra-Wideband communication systems. This antenna is obtained by rounding and notching the edges of antenna arms. Antenna parameters for the designed structure are examined according to the restrictions specified by Federal Communications Commission. Thus, Return Loss (S 11), Voltage Standing Wave Ratio (VSWR), gain, radiation pattern and impedance are observed in the 3.1 GHz-10.6 GHz frequency range. Additionally, the effect of arm length and dielectric material on antenna performance are interpreted in the same range. According to obtained results, the proposed structure satisfies the bandwidth requirements for Ultra-Wideband systems. Gain and impedance variations are also in acceptable limits for Ultra-Wideband applications. The proposed antenna is analyzed through CST Microwave Studio program.

This study presents an origami inspired sub-6 GHz accordion monopole antenna for 5G applications. Parametric study is performed by varying monopole height, fold width and bevel angle to examine the antenna performance in the 1 GHz -6 GHz frequency range. The proposed antenna is designed with the values that yield the best performance in accordance with the results of parametric study. Antenna behavior is then evaluated in terms of Return Loss, gain and radiation pattern. The proposed antenna operates in 1.22 GHz -6 GHz frequency range which covers almost the entire sub-6 GHz range with an approximate impedance bandwidth of 132%. Hence, the designed antenna structure has a good performance in the sub-6 GHz and it is a promising design for 5G applications.

This paper presents a novel frequency reconfigurable antenna design for sub-6 GHz applications, featuring a unique combination of antenna elements and control mechanisms. The antenna is composed of an outer split-ring resonator loaded with an inner spiral resonator, which can be adjusted through the remote control of PIN diode or Single Pole Double Throw (SPDT) switches. The compact antenna, measuring 22 × 16 × 1.6 mm3, operates in broadband, or tri-band mode depending on the ON/OFF states of switches. The frequency reconfigurability is achieved using two BAR64−02V PIN diodes or two CG2415M6 SPDT switches acting as RF switches. SPDT switches are controlled remotely via Arduino unit. Additionally, the antenna demonstrates an omni-directional radiation pattern, making it suitable for wireless communication systems. Experimental results on an FR-4 substrate validate the numerical calculations, confirming the antenna’s performance and superiority over existing alternatives in terms of compactness, wide operating frequency range, and cost-effectiveness. The proposed design holds significant potential for applications in Wi-Fi (IEEE 802.11 a/n/ac), Bluetooth (5 GHz), ISM (5 GHz), 3G (UMTS), 4G (LTE), wireless backhaul (4G and 5G networks), WLAN (IEEE 802.11 a/n/ac/ax), 5G NR n1 band, and Wi-Fi access points due to its small size and easy control mechanism. The antenna can be integrated into various devices, including access points, gateways, smartphones, and IoT kits. This novel frequency reconfigurable antenna design presents a valuable contribution to the field, paving the way for further advancements in wireless communication systems.