A Frequency Triplexer for Ultra-Wideband Systems Utilizing Combined Broadside- and Edge-Coupled Filters

Abstract

Abstract-A fully integrated triplexer for multi-band ultrawideband radio is presented. The triplexer utilizes a microstrip network and three combined broadside-and edge-coupled filters. It is fully integrated in a printed circuit board with low requirements on the printed circuit board process tolerance. Three flat sub-bands in the frequency band 3.1-4.8 GHz have been achieved. The group delay variation within each 500 MHz sub-band was measured to be around 1 ns. A good agreement between simulation and measurement was obtained.

Manifold Multiplexer

“…An alternate ilter design as shown in Figure 3(b) is presented in Refs. [21,22]. Both this approaches have been adopted according to requirements.…”

“…Note: Here a diplexer is designed and implemented on the basis of FMN (Figure 4) and to see the design and implementation of the triplexer with a diferent BPF, see Ref. [22].…”

Parallel Channels Using Frequency Multiplexing Techniques

“…Neighbouring sub-bands are most critical to a subband since the band-pass filter has limited rejection close to its pass-band. The entire network is optimized together with the filters to achieve flat passbands and a symmetric performance between the sub-bands (Karlsson et al, 2006;Karlsson & Gong, 2007;Karlsson et al Nov. 2008). Fig.…”

“…The isolation between the nonneighbouring alternate sub-bands is 51 dB. This work was originally presented in (Karlsson et al Nov. 2008). Fig.…”

Frequency Triplexer for Ultra-Wideband Systems (6–9 GHz)

“…We have recently proposed a frequency multiplexing technique in our study on ultrawideband antennas [20], transceivers [21] and [22]. A study of a multiplexer using planar microstrips was conducted in [23].…”