Ultra Wideband Vias and Power Dividers in Microstrip-Slot Technology

Abstract

The design of ultra-wideband vias and power dividers in microstrip-slot technology is presented. The devices employ two substrates supported by a common ground plane. Their design is accomplished with the use of commercially available full EM analysis and design software. Low insertion loss and good return loss performances over an ultra wide frequency band for the designed structures are noted.

Bandpass-Response Power Divider With High Isolation

“…The slotline as well as DGS are etched in mid layer, namely the ground plane. This power divider consists of the basic circuit unit microstrip-to-slotline transition, which abandons the traditional microstrip-to-slotline configuration with quarter-wavelength slotline like the ones in [1][2][3][4][5][6][7], so that the isolation resistor can be installed easily. In order to obtain perfect impedance matching between microstrip and slotline, the characteristic impedances of them must meet following expression [12]: Z m and Z s represent the characteristic impedances of microstrip line and slotline, respectively.…”

“…The bandwidth, however, is less than 20% for traditional singlesection one. With the increasing applications for ultra wideband (UWB) systems, various UWB power dividers based on slotline techniques have been designed [1][2][3][4][5][6][7][8][9][10][11]. In [1], a compact coplanar UWB out-of-phase power divider based on slotline techniques has been proposed, which could obtain low insertion loss and good impedance matching at input port over the range 3.1 GHz-10.6 GHz.…”

Power Divider Based on Stepped-Impedance Slotline

“…With the research on slotline techniques, various power dividers based on slotline techniques have been designed [6][7][8]. By utilizing microstrip-to-slotline coupling structure [9][10][11][12][13], some UWB multilayer power dividers have been proposed in [14][15][16][17][18][19]. According to the phase difference between output ports, the slotline power dividers can be classified in-phase power dividers and out-of-phase power dividers.…”

“…According to the phase difference between output ports, the slotline power dividers can be classified in-phase power dividers and out-of-phase power dividers. Due to the opposite directions of output ports towards, the phase difference of two dividing signals is 180 • for the power dividers based on slotline techniques in [6][7][8][14][15][16]. In-phase dividing signals can be obtained as long as the two output branches are placed in the same direction like the ones in [17][18][19].…”

Uwb Multilayer Power Divider With High Isolation

“…Since the unofficial definition about ultra wideband (UWB) was determined in 2002, hundreds of UWB components have been designed and applied [1][2][3][4][5][6][7][8]. Power dividers play an indispensable role in numerous wireless communication systems.…”