Design and Comparison of 24 GHz Patch Antennas on Glass Substrates for Compact Wireless Sensor Nodes. (10th January 2011)

• Record Type: Journal Article
• Authors: Ohnimus, Florian; Maaß, Uwe; Fotheringham, Gerhard; Curran, Brian; Ndip, Ivan; Fritzsch, Thomas; Wolf, Jürgen; Guttowski, Stephan; Lang, Klaus-Dieter
• Other Names: Wang Chien-Jen Academic Editor.
• Is Part Of: International journal of microwave science and technology. Volume 2010(2010)
• Publication Date: 2011-01-10
• Subjects: Radio frequency -- Periodicals; Microwave circuits -- Periodicals; Radiofréquences; Circuits pour micro-ondes; Microwave circuits; Radio frequency; Periodicals; Electronic journals; 621.3813
• DOI: 10.1155/2010/535307
• Languages: English
• ISSNs: 1687-5826

Abstract

Abstract : Three patch antennas suitable for integration and operation in a compact 24 GHz wireless sensor node with radar and communication functions are designed, characterized, and compared. The antennas are manufactured on a low loss glass wafer using thin film (BCB/Cu) wafer level processing (WLP) technologies. This process is well suited for 3D stacking. The antennas are fed through a microstrip line underneath a ground plane coupling into the patch resonator through a slot aperture. Linear polarization (LP), dual mode (DM) operation, and circular polarization (CP) are achieved through the layout of the slot aperture and rectangular patch dimensions. Antenna gain values of ~ 5.5 dBi are obtained in addition to the 10 dB impedance bandwidths of 900 MHz and 1.3 GHz as well as 500 MHz CP bandwidth with a 3 dB axial ratio for the LP, DM, and CP patch antennas, respectively.