A Double-Band Planar Filter Based on Short-Length... bandwidth is obtained by cascading the reactively charged parallel coupled lines of short length (< 〖90〗^0). The proposed filter has the same electrical performance in both passbands at frequencies f1 and mf1, where m is the separation frequency between the two passbands. A complete set of design equations for an arbitrary number of filter stages is derived using the standard filter synthesis technique. This provides a simple, low-cost, high-performance filter with multiple bands. Introduction: Multiple channels are used by most modern communication devices. Therefore, multiband operations are highly required in today's communication systems. In this work, a filter with two frequency passbands (f1 and mf1) is proposed. This is achieved by cascading the conventional coupled line filter with length less than 〖90〗^0 and loading it with open-circuit shunt stubs. Since the length of the coupled line is reduced, the size of the filter is physically reduced. Another advantage is that, since the equations used to design the filter are derived without using any assumptions, there is no need for a tuning capacitor in this circuit. Circuit Implementation: The conventional coupled line filter operates at two center frequencies when ports 2 and 3 are connected to ground and ports 1 and 4 are terminated with open-circuited and cascaded shunt stubs. The shunt lines on the cascaded nodes are combined into a single shunt line. The admittance of the stubs must be the same before and after the combination. RF-35 substrate with a thickness of 0.76 mm and a relative permittivity of ...... half the paper ...... Figure 1: Schematic of the project proposed in the document Figure 2: Schematic and graph for the project conventional Figure 3: Chart for the design proposed in the paper Figure 4: Schematic and chart for the 2.4 GHz/10 GHz design Figure 5: Schematic of the proposed model with reduced insertion loss and length Figure 6: Chart for the proposed model with reduced insertion loss and length References:[1]C.-W.Tang, S.-F.Yo and I.-C,Liu, "Design of a dual-band bandpass filter with low co-fired ceramic technology temperature”, IEEE Trans.Microw.Tech., vol. 8, pp. 3327-3332. “Bandwidth Compensation Method for Miniature Parallel Line Filters,” IEEE Trans.Microw Tech., vol David M. Pozar.

Topic > A Double-Band Planar Filter Based on Short-Length... bandwidth is obtained by cascading the reactively charged parallel coupled lines of short length (< 〖90〗^0). The proposed filter has the same electrical performance in both passbands at frequencies f1 and mf1, where m is the separation frequency between the two passbands. A complete set of design equations for an arbitrary number of filter stages is derived using the standard filter synthesis technique. This provides a simple, low-cost, high-performance filter with multiple bands. Introduction: Multiple channels are used by most modern communication devices. Therefore, multiband operations are highly required in today's communication systems. In this work, a filter with two frequency passbands (f1 and mf1) is proposed. This is achieved by cascading the conventional coupled line filter with length less than 〖90〗^0 and loading it with open-circuit shunt stubs. Since the length of the coupled line is reduced, the size of the filter is physically reduced. Another advantage is that, since the equations used to design the filter are derived without using any assumptions, there is no need for a tuning capacitor in this circuit. Circuit Implementation: The conventional coupled line filter operates at two center frequencies when ports 2 and 3 are connected to ground and ports 1 and 4 are terminated with open-circuited and cascaded shunt stubs. The shunt lines on the cascaded nodes are combined into a single shunt line. The admittance of the stubs must be the same before and after the combination. RF-35 substrate with a thickness of 0.76 mm and a relative permittivity of ...... half the paper ...... Figure 1: Schematic of the project proposed in the document Figure 2: Schematic and graph for the project conventional Figure 3: Chart for the design proposed in the paper Figure 4: Schematic and chart for the 2.4 GHz/10 GHz design Figure 5: Schematic of the proposed model with reduced insertion loss and length Figure 6: Chart for the proposed model with reduced insertion loss and length References:[1]C.-W.Tang, S.-F.Yo and I.-C,Liu, "Design of a dual-band bandpass filter with low co-fired ceramic technology temperature”, IEEE Trans.Microw.Tech., vol. 8, pp. 3327-3332. “Bandwidth Compensation Method for Miniature Parallel Line Filters,” IEEE Trans.Microw Tech., vol David M. Pozar.