[1] Sebastian M T[J]. Dielectric  Materials  for  Wireless Communication., 1-48(2008).

[2] Narang S B, Bahel S[J]. J. Ceram. Process. Res., 11, 316(2010).

[3] Sebastian M T, Ubic R, Jantunen H[J]. Int. Mater. Rev., 60, 392(2015).

[4] Chen L F, Ong C K, Neo C P, Varadan V V, Varadan V K[J]. Microwave  Electronics:  Measurement  and  Material Characterization, 37-141(2004).

[5] Kajfez D, Guillon P[J]. Dielectric  Resonators 2nd  Ed., 327-430(1998).

[6] Hakki B W, Coleman P D[J]. IEEE Trans. Microwave Theory Tech., 8, 402(1960).

[7] Courtney W E[J]. IEEE Trans. Microwave Theory Tech., 18, 476(1970).

[8] Kajfez D[J]. IEEE Trans. Microwave Theory Tech., 32, 941(1984).

[9] Kobayashi Y[J]. IEEE Trans. Microwave Theory Tech., 33, 1361(1985).

[10] Dube D C, Zurmuhlen R, Bell A, Setter N, Wersing W[J]. J. Am. Ceram. Soc., 80, 1095(1997).

[11] Fan X C, Chen X M, Liu X Q[J]. IEEE Trans. Microwave Theory Tech., 53, 3130(2005).

[12] Krupka J, Huang W T, Tung M J[J]. Meas. Sci. Technol., 16, 1014(2005).

[13] Li L, Zhu J Y, Chen X M[J]. IEEE Trans. Microwave Theory Tech., 64, 3781(2016).

[14] Kajfez D, Gundavajhala A[J]. Electron. Lett., 29, 1936(1993).

[15] Alford N M, Breeze J, Penn S J, Poole M[J]. IEE Proc.: Sci. Meas. Technol., 147, 269(2000).

[16] Sebastian M T, Jawahar I N, Mohanan P[J]. Mater. Sci. Eng. B, 97, 258(2003).

[17] Cho J Y, Yoon K H, Kim E S[J]. J. Am. Ceram. Soc., 86, 1330(2003).

[18] Li L, Chen X M[J]. J. Am. Ceram. Soc., 89, 544(2006).

[19] Li L, Chen X M[J]. J. Am. Ceram. Soc., 89, 557(2006).

[20] Li L, Chen X M, Fan X C[J]. J. Eur. Ceram. Soc., 26, 3265(2006).

[21] Li L, Chen X M[J]. Ferroelectrics, 387, 7(2009).

[22] Wang D W, Zhou D, Zhang S Y, Vardaxoglou Y, Whittow W G, Cadman D, Reaney I M[J]. ACS Sustainable Chem. Eng., 6, 2438(2018).

[23] Zhang J, Luo Y, Yue Z X, Li L T[J]. J. Am. Ceram. Soc., 102, 342(2019).

[24] Li L, Chen X M, Ni L, Fu M S[J]. Appl. Phys. Lett., 91, 092906(2007).

[25] Li L, Fang Y, Chen X M[J]. J. Am. Ceram. Soc., 95, 982(2012).

[26] Li L, Zhang W, Chen X M, Zhu H Y[J]. J. Appl. Phys., 111, 064108(2012).

[27] Li L, Zhang B Q, Chen X M[J]. Appl. Phys. Lett., 103, 192902(2013).

[28] Li L, Wang Z W, Chen X M[J]. Mater. Res. Bull., 67, 251(2015).

[29] Krupka J, Derzakowski K, Tobar M, Hartnett J, Geyer R G[J]. Meas. Sci. Technol., 10, 387(1999).

[30] Kooi P S, Leong M S, Prakash A L S[J]. IEE Proc. H Microwave Opt. Antennas, 32, 7(1985).

[31] Yuan H X, Chen X M, Mao M M[J]. J. Am. Ceram. Soc., 92, 2286(2009).

[32] O’Bryan H M, Thomson J, Plourde J K[J]. J. Am. Ceram. Soc., 57, 450(1974).

[33] Huang C L, Chen Y C[J]. Mater. Sci. Eng. A, 345, 106(2003).

[34] Li L, Spreitzer M, Suvorov D[J]. Appl. Phys. Lett., 104, 182902(2014).

[35] Hong W B, Li L, Yan H, Wu S Y, Yang H S, Chen X M[J]. J. Materiomics, 6, 233(2020).

[36] Li L, Hong W B, Chen G Y, Chen X M[J]. J. Alloys Compd., 774, 706(2019).