In this paper an approach for broadening of operational band in a dense array of dipole antennas by implementing passive split-loop resonators (SLRs) as decouplers is presented. Compared to the previous method, where three closely located active dipoles were decoupled by two passive dipole, the operational band is significantly improved from 0.5% to 1.6% at the same level of decoupling $-$8 dB for the cross-talk and inter-channel transmittance. To delineate, the presence of two SLRs results in birefringence of the resonant interaction of SLRs which creates two different eigenmodes for decoupling. As a result, a dual-resonant decoupled band is obtained. Alongside with analytical investigation, numerical and experimental investigations verify the veracity of our approach. Moreover, the possibility of decoupling by SLRs for arrays with more active dipoles is investigated numerically.

在本文中，提出了一种通过将无源裂环谐振器（SLR）用作解耦器来加宽偶极天线密集阵列中的工作频带的方法。与先前的方法（其中三个紧密定位的有源偶极子通过两个无源偶极子解耦）相比，在相同的去耦水平下，工作频带从0.5％显着提高到1.6％$-$串扰和通道间透射率为8 dB。概括地说，两个SLR的存在导致SLR共振相互作用的双折射，从而产生了两种不同的解耦本征模式。结果，获得了双谐振解耦频带。除了分析研究之外，数值和实验研究也证明了我们方法的准确性。此外，对具有更多有源偶极子的阵列通过SLR进行解耦的可能性进行了数值研究。