Abstract:
Currently, there is strong and increasing interest from industry for a single transceiver
system to cover multiple frequency bands such as Wireless bands, and mobile cellular
systems. As one of the most important front-end components, multi-band band-pass filters
(BPFs) with compact size, planar configuration, and good performance have been
investigated aggressively and substantial progress has been achieved. Design and implement
compact resonator with via free to be used for multi band wireless application. The dual
composite right left handed unit cell will improve the compactness and introduces multi-
band configuration.
In this project two designs are introduced, the first design presents for the first time quad
band BPF based on coupling between dual composite right/left handed transmission line and
Composite right left hand transmission line. Where that the D-CRLH is responsible for the
higher resonant frequencies and the CRLH is responsible for lower resonant frequencies. The
four resonance frequencies are at 3.9 GHz, 4.6 GHz, 6.2 GHz and 7.1 GHz. The two designs
are simulated, fabricated with compact size (16.5*14.6mm2
).
The second design presents for the first time, a new compact multiband resonator based on tuning of interdigital capacitor with Composite Right/Left-Handed (CRLH) transmission line
cell with controllable frequencies and high selectivity. The operating frequencies of the
resonator are 2.7GHz, 4 GHz, and 10.5GHz with insertion loss 3 dB, 1.3 dB and 1.7 dB,
respectively. Furthermore, the proposed design has good matching of return losses that are
equal to 14 dB, 12 dB, and 23 dB respectively. This proposed resonator is designed on
Rogers 4350B material with dielectric constant 3.48 and thickness 1.524 mm. This resonator
is introduced to fulfill compactness of modern technology with perfect size reduction
(16.5x8.9 mm2
). The resonator consists of CRLH unit cell connected with patch capacitor
and interdigital capacitor that tune the design and provides the third band.
