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Abstract
A new compact design of diplexer with high electrical performances is proposed for base station antennas operating within frequency bands 2.3–2.4/2.49–2.69 GHz. The diplexer consists of two interdigital band-pass filters and coaxial power divider. Proposed design has high potential from view poin of implementation of wide-band as well as medium and narrow bands filters. The fabricated diplexer shows the following measured characteristics: reflection coefficient is -18 dB within passbands, insertion loss is -0.28 dB, isolation of ports is -30 dB. Diplexer has the relatively simple easy to manufacture design and compact dimensions, so it may be directly integrated into the base station antennas.
Highlights
The revolutionary fast progress of mobile comminications systems is accompanied with the use of more high frequency bands, essential extension of operational bands, utilizing the multi-band and multi-beam operational mode
One of the most widely utilizing solutions is the combined aperture of base station antenna
The base station antennas designed with the dipole reuse technology have the reduced geometrical dimensions
Summary
The revolutionary fast progress of mobile comminications systems is accompanied with the use of more high frequency bands, essential extension of operational bands, utilizing the multi-band and multi-beam operational mode This is due to very high technical requirements to the base stations and their antennas which should satisfy the increasing wireless systems capacity needs. In this case only one wide-band linear antenna array is used which operates simultaneously in two frequency bands, instead of two linear antenna arrays placed in parallel and operating in two narrow frequency bands This technology is known as "dipole reuse" and it is based on the use of various radio frequency diplexers [1,2,3,4,5,6]. The radio frequency diplexers are key components for modern base stations and the development of diplexers is a problem of current importance
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