Affiliation of Author(s):[1]Univ Elect Sci & Technol China, State Key Lab Elect Thin Films & Integrated Device, Chengdu 610054, Peoples R China;[2]Univ Elect Sci & Technol China, Yangtze Delta Reg Inst Huzhou, Huzhou, Peoples R China;[3]Chengdu Univ Informat Technol, Informat Mat & Device Applicat Key Lab Sichuan Pro, Chengdu 610225, Peoples R China
Journal:CERAMICS INTERNATIONAL
Key Words:Co substitution; Composite ceramics; Microwave dielectric properties; LTCC; Patch antenna
Abstract:In the field of microwave dielectric ceramics for patch antennas, it has always been a thorny issue to simultaneously satisfy high dielectric constant, low sintering temperature and low dielectric loss. Here, a CCZN (x = 0.04) composite ceramic with excellent microwave dielectric properties was developed. It can be found that an appropriate amount of Co2+ substitution can enhance the compactness, increase the dielectric constant (epsilon(r)), reduce the dielectric loss (tan delta) and enhance the temperature coefficient (tau(f)). The composite ceramic with excellent dielectric properties (epsilon(r) = 22.6, Q x f = 37,624 GHz, tau(f) =-64.9 ppm/degrees C) shows good sintering compatibility with Ag. Based on this composite ceramic, a high-performance patch antenna was designed for Beidou satellite navigation system (BDS). It presents a small size of 30 x 30*3.8 mm(3) and excellent radiation performance (return loss = -32.9 dB, VSWR = 1.047, impedance bandwidth = 60.6 MHz, radiation efficiency = 94.6% and realized gain = 7.704 dB). This work promotes the application of microwave dielectric ceramics in the field of patch antennas.
Document Type:Article
Volume:48
Issue:13
Page Number:18522-18529
ISSN No.:0272-8842
Translation or Not:no