Medical Devices R&D Center, Gachon University Gil Medical Center, 21, 774 Beon-gil, Namdong-daero, Namdong-gu, Incheon 21565, Korea.
Department of Biomedical Engineering, College of Medicine, Gachon University, 38-13, 3 Beon-gil, Dokjom-ro 3, Namdong-gu, Incheon 21565, Korea.
Sensors (Basel). 2022 Apr 1;22(7):2708. doi: 10.3390/s22072708.
The consumption of multimedia content is ubiquitous in modern society. This is made possible by wireless local area networks (W-LAN) or wire service systems. Bandpass filters (BPF) have become very popular as they solve certain data transmission limitations allowing users to obtain reliable access to their multimedia content. The BPFs with quarter-wavelength short stubs can achieve performance; however, these BPFs are bulky. In this article, we propose a compact BPF with a T-shaped stepped impedance resonator (SIR) transmission line and a folded SIR structure. The proposed BPF uses a T-shaped SIR connected to a J-inverter structure (transmission line); this T-shaped SIR structure is used to replace the /4 transmission line seen in conventional stub BPFs. In addition, a folded SIR is added to the short stubs seen in conventional stub BPFs. This approach allows us to significantly reduce the size of the BPF. The advantage of a BPF is its very small size, low insertion loss, and wide bandwidth. The overall size of the new BPF is 2.44 mm × 1.49 mm (0.068 × 0.059). The proposed BPF can be mass produced using semiconductors due to its planar structure. This design has the potential to be widely used in various areas including military, medical, and industrial systems.
多媒体内容的消费在现代社会中无处不在。这要归功于无线局域网（WLAN）或有线服务系统。带通滤波器（BPF）变得非常流行，因为它们解决了某些数据传输限制，使用户能够可靠地访问他们的多媒体内容。具有四分之一波长短截线的 BPF 可以实现性能；然而，这些 BPF 体积庞大。在本文中，我们提出了一种使用 T 形阶梯阻抗谐振器（SIR）传输线和折叠 SIR 结构的紧凑型 BPF。所提出的 BPF 使用连接到 J 型反相器结构（传输线）的 T 形 SIR；这种 T 形 SIR 结构用于替代传统短截线 BPF 中看到的/4 传输线。此外，在传统短截线 BPF 中看到的短截线上添加了折叠 SIR。这种方法可以显著减小 BPF 的尺寸。BPF 的优点是尺寸非常小、插入损耗低和带宽宽。新 BPF 的整体尺寸为 2.44mm×1.49mm（0.068×0.059）。由于其平面结构，新的 BPF 可以使用半导体进行批量生产。这种设计有可能在军事、医疗和工业系统等各个领域得到广泛应用。
