Bis(4-pyrid­yl) disulfide–2,2′-[(p-phenyl­enebis(­oxy)]diacetic acid (1/1)

The asymmetric unit of the title 1:1 co-crystal, C10H8N2S2·C10H10O6, comprises two half-mol­ecules, the bis­(4-pyrid­yl) disulfide having twofold rotational symmetry and the 2,2′-[(p-phenyl­enebis(­oxy)]diacetic acid having crystallographic inversion symmetry. In the disulfide mol­ecule, the dihedral angle between the two pyridine rings is 86.8 (1)°, while the carboxyl groups of the substituted quinone lie essentially in the plane of the benzene ring [dihedral angle = 5.3 (1)°]. In the crystal, the components are linked via inter­molecular O—H⋯N hydrogen bonds into zigzag chains which extend along c and are inter­linked through C—H⋯π associations

Design of Compact Planar Diplexer Based on Novel Spiral-Based Resonators

A miniaturized planar diplexer utilizing the novel spiral-based resonators is proposed. The given cell which is initially proposed in this article is composed of two separated rectangular spirals which are asymmetrical to each other and thus, it is called as ‘asymmetrical separated spirals resonator’ (ASSR). ASSR has more superior transmission property than the previous prototype and extremely compact dimension is also achieved. It is demonstrated that ASSR can exhibit bandpass performance with high frequency selectivity and good transmission property within the relatively low frequency band. Based on the given characteristic, one planar diplexer composed of T-junction and two ASSRs is synthesized and the fabricated prototype with compact dimension is achieved, thanks to ASSRs explored. Simultaneously, the transversal dimension of each channel is extremely compact because ASSRs are completely embedded in the feed lines. Both the simulated and measured results indicate that satisfactory impedance matching and high isolation between two channels are achieved. Furthermore, the proposed diplexer is uniplanar and no defected ground structure is introduced