Stub (electronics)

About: Stub (electronics) is a research topic. Over the lifetime, 8172 publications have been published within this topic receiving 75018 citations.

Design of a Variable Inclination Continuous Transverse Stub Array

Abstract: This paper presents a Variable Inclination Continuous Transvers Stub (VICTS) antenna. It is a hemispherical beam scanning antenna with a conformal mechanical profile. It only includes two main components, the radiating layer and the feeding layer. By changing the relative angle between the two layers, a continuous, wide-angle beam scanning can be achieved. This paper describes the principle of the VICTS antenna and designs a prototype. The simulation results show that the prototype can realize beam scanning from 5 degree to 65 degree in pitch angle while the gain decreases less than 5dB and the scan impedance keeps stable.

Design, analysis and characterization of four port multiple-input-multiple-output UWB-X band antenna with band rejection ability for wireless network applications

Abstract: In this proposed research article, four-port dual notched bands multiple-input-multiple-output (MIMO) antenna configuration is proposed and is experimentally investigated by fabricating prototype. Initially, a single element is fabricated which is converted to 2 × 2 MIMO configuration and finally to 4 × 4 MIMO configuration. The proposed MIMO antenna is designed to cover impedance bandwidth of 3.15–11.36 GHz and hence is useful in applications for ultrawideband and X-Band applications. Two interfering bands, WiMAX (3.30–4.05 GHz) and WLAN (4.90–5.99 GHz) are eliminated by using an inverted T-shaped stub and C-shaped slot on the radiating patch of the MIMO antenna. The proposed MIMO antenna offers good diversity performance with envelope correlation coefficient 9.95 dB and total active reflection coefficient ≤ 20 dB in the entire operating band. Also, antenna gain is stable in the entire operating band except in interfering bands with a maximum radiation efficiency of more than 80% and stable radiation pattern. All the above said features make the proposed antenna suitable for high-speed wireless network applications.

Leakage-wave antenna

Abstract: In a CRLH leaky wave antenna, gain is improved. Leaky wave antenna 100 includes a part 23i forming a capacitor, a transmission line 21i, a part forming an inductor (stub) 24i and 25i, and a capacitor on a dielectric substrate 10 by a microstrip conductor. 22i, which is a portion that forms, forms the i-th repeating unit (antenna element) (i is 1 to 17). These 17 repetitions form a Composite Right and Left Handed, CRLH structure. Further, the metal plate 30 having the first dielectric plate 11 and the slots 31 to 36 is provided thereon. By adding the slots 31 to 36, the gain can be improved without impairing the characteristics of the CRLH structure that the beam can be scanned at a wide angle with a small frequency change compared to the case where the slots 31 to 36 are not provided. [Selection] Figure 1

A Highly Selective Rasorber Based on Second-Order Resonance

Abstract: A novel frequency-selective rasorber with one highly selective passband between two absorption bands is presented. Based on the equivalent circuit analysis, the approach of using a second-order band-pass response in the lossless layer is adopted to improve the selectivity of the passband. A two-layered structure consisting of one lossy and one lossless layer is then used for implementation. The lossy layer is constructed using stub resonators, while an aperture-coupled resonator is used to realize lossless layer and achieve the highly selective passband. Under normal incidence, the operating bandwidth of the proposed rasorber is 110.6%. One passband with sharp roll-off edge and small insertion loss (0.08 dB) is achieved at 4.3 GHz. For demonstration, one prototype was fabricated and measured, and a good agreement is observed accordingly.