The Design of a Novel Compact Ultra-Wideband (Uwb) Power Divider

Abstract

The design of a compact coplanar power divider with novel structure is presented by making a full use of the theories of microstrip-to-slotline transition. To obtain two in-phase signals over a wide frequency range, the two output branches are placed in the same layer. Moreover, a half-wavelength slotline is employed to expand the working frequency range. The presented compact power divider shows a low insertion and good return loss performance at input port. The simulated and measured results have shown a good agreement over the frequency range 2.2 GHz-11 GHz.

Uwb Multilayer Power Divider With High Isolation

“…In this presented design, the isolation between output ports and the impedance matching at output ports, according to the experimental results, have been improved greatly compared with those proposed in [9][10][11][12][13] over the range from 3.8 GHz to 10.4 GHz.…”

“…In [13], a tapered slotline and a fan-shaped slotline were utilized to take the place of the circular ones designed in [10]. The changes employed in [10][11][12][13] indeed improved the homologous performances to some extent. However, these improvements are negligible.…”

“…This power divider employed separated output branches and introduced two compensatory microstrip circular stubs. By making use of a similar method, a new coplanar in-phase UWB power divider was designed in [11]. In [12], one metal pin was utilized to extend the operating band.…”

“…With the rapid development of UWB wireless systems, the demands for UWB power dividers are greatly increasing. For the sake of satisfying the imperious needs, some UWB power dividers based on microstrip-to-slotline transition techniques have been designed and fabricated [9][10][11]. In order to improve the performance, some new UWB power dividers with improved structures have been proposed [12,13].…”

“…However, because of the combination of output branches, the isolation between output ports and the return losses at output ports were very poor. In order to improve the performances of UWB power dividers based on microstrip-to-slotline transitions, the output branches of power dividers presented in [10,11] were split into two parts. In [10], a multilayer compact UWB out-of-phase power divider was proposed.…”