Fermi 伽玛射线望远镜探测到伽玛辐射AGN 数量已经大大超过了EGRET，开启了伽玛AGN研究的新时代。在Fermi AGN 样本中BL Lac 型天体的数量已经超过了平谱射电类星体，成为数量最多的一类伽玛AGN，而大部分Fermi BL Lac为高峰频BL Lac天体(HBLs)。 我们的项目将在以前工作的基础上对Fermi 时代特殊HBLs进行高分辨率射电结构与性质研究。具体包括：完整UHBLs 样本的射电性质研究，高光度HBLs 的射电结构与性质研究，对整体HBLs 的射电性质的统计研究等。通过我们的研究将会对Fermi 时代特殊 HBLs的喷流结构，自行，偏振等方面的射电性质给出很好的分析，从而更好的理解Fermi HBLs 与非Fermi HBLs以及其他类型BL Lac天体的区别与联系，从而将更好的理解射电辐射与伽玛射线辐射的关系以及辐射过程。

The Fermi telescope has detected much more AGNs with gamma-ray emission than the EGRET telescope. Among the AGN detected by Fermi, BL Lac objects have been the larger sample than FSRQs and majority of the Fermi BL Lacs are high-energy-peaked BL Lac objects(HBLs). This project will use high resolution radio data to study particular HBLs in the Fermi era. We aim for: 1 VLBI studies for the whole UHBLs sample given in Nieppola et al. 2006. 2, the radio propertes of high luminosity HBLs. 3 The statistical study of the radio properties of Fermi HBLs and non-Fermi HBLs. Through our research, we will obtain information about the radio properties of HBLs on jet structure, polarization during Fermi era, and finally have some clues about the correlations between radio and γ-ray process.