Equivalent Circuit (EC) Approximation of Miniaturized Elliptical UWB Antenna for Imaging of Wood

Abstract A compact UWB FSS reflector is presented based on interdigital structure for gain enhancement of an UWB antenna. An equivalent circuit approach is proposed for the analysis of the FSS reflector. The reflector comprises a 6 × 6 array of unit cell dimension 6 mm × 6 mm and which is very compact. The reflector gives a linear phase response over UWB band. A UWB monopole antenna is designed with a half circular disc structure based on microstrip technology. A maximum of 5 dBi gain enhancement is achieved with this compact FSS reflector when placed at a distance below the antenna. The measured results closely follow the simulated ones which proves feasibility of this design.

Download Full-text

A Novel UWB Antenna with Dual Band-Notched Characteristics

Frequenz ◽

10.1515/freq-2015-0002 ◽

2015 ◽

Vol 69 (11-12) ◽

Cited By ~ 3

Author(s):

Yongfan Lin ◽

Jiangang Liang ◽

Goucheng Wu ◽

Zhiyong Xu ◽

Xuebin Niu

Keyword(s):

Equivalent Circuit ◽

Basic Principle ◽

Electromagnetic Interference ◽

Dual Band ◽

Uwb Antenna ◽

Parallel Configuration

AbstractIn this article, started from analyzing the basic principle of band-notched characteristics, a feasibly method used for band-notched antenna is demonstrated and the equivalent circuit for this method is designed. A novel UWB antenna is designed. Based on this method, two stubs which can be equivalent to shorted stubs in parallel configuration are added to realize dual band-notched characteristics. Simulated and measured results all show that the UWB antenna yields an impendence bandwidth of 2.0–10.6 GHz by defining VSWR ≦ 2, and two obvious band-notched functions (3.27–3.83 GHz, 4.60–5.90 GHz) occur at the working bandwidth of WIMAX (3.3–3.7 GHz) and HiperLAN/2 (5.15–5.35 GHz, 5.47–5.725 GHz), so the electromagnetic interference between UWB application and WIMAX, HiperLAN/2 can be suppressed.

Download Full-text

Application of Equivalent Circuit Method in Designing the Vivaldi UWB Antenna

2008 4th International Conference on Wireless Communications, Networking and Mobile Computing ◽

10.1109/wicom.2008.256 ◽

2008 ◽

Cited By ~ 1

Author(s):

Li Bian ◽

Xiang-Qian Che

Keyword(s):

Equivalent Circuit ◽

Uwb Antenna ◽

Equivalent Circuit Method

Download Full-text

Suppressed Band Characteristics of an UWB Conical Monopole Antenna with Split Loops Based on the Equivalent Circuit

International Journal of Antennas and Propagation ◽

10.1155/2017/5375036 ◽

2017 ◽

Vol 2017 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Eun-Seok Jang ◽

Che-Young Kim ◽

Dae-Geun Yang ◽

Sung-Su Hong

Keyword(s):

Equivalent Circuit ◽

Mutual Inductance ◽

Monopole Antenna ◽

Dual Band ◽

Equivalent Circuits ◽

Uwb Antenna ◽

Load Impedance ◽

Measurement Results ◽

Lc Resonator ◽

Insight Into

In this study, the principle of band suppressing an UWB antenna by attaching a small resonator is explained by developing its equivalent circuit. The realized UWB antenna is a conical monopole antenna that contains a split loop for band suppression. The conical monopole antenna corresponds to a transmission line terminated with load impedance, and the split loop is an LC resonator. The coupling between the conical monopole antenna and the split loop is represented as mutual inductance. Equivalent circuits for the UWB antenna suppressing single band [WLAN] and dual band [WLAN, WiMAX] have been suggested, and these equivalent circuits provide insight into the performance characteristics of the developed band suppressed UWB antenna to which a small sized resonator is installed. Simulation and measurement results on the input impedance and VSWR of the proposed equivalent circuit are closely matched. Thus, the validity of the equivalent circuit is confirmed. The measurement results demonstrate that the proposed antenna exhibits a gain of over 3 dBi in the working band and has an omnidirectional radiation pattern. Band rejection has been also implemented by split loops.

Download Full-text