Compact diplexer

A diplexer comprising:

• a low-pass filter and a high-pass filter;
• a first terminal serving as a common input terminal to both of said filters, a second terminal serving as an output terminal of said high-pass filter, and a third terminal serving as an output terminal of said low-pass filter;
• wherein each of said filters comprises inductors and capacitors arranged in successive stages in the configuration of a ladder network having series branches and parallel branches;
• in said high-pass filter, each of a plurality of said series branches comprises a capacitor, and each of a plurality of said parallel branches comprises an inductor;
• in said low-pass filter, each of a plurality of said series branches comprises an inductor, and each of a plurality of said parallel branches comprises a capacitor;
• said diplexer further comprises a dielectric substrate supporting said inductors and said capacitors of each of said filters;
• each of said inductors in both of said filters comprises a toroid and wherein, in each of said filters, the succession of stages begins with a first stage connecting with said first terminal and terminates with a final stage;
• in each of said stages, the inductors and the capacitors are electrical components of the stage;
• and
• wherein locations of electrical components of the first stages of both of said filters are relatively close to each other, and locations of electrical components of the final stage of said low-pass filter are relatively far from locations of electrical components of the final stage of said high-pass filter, thereby to enhance isolation of an electric signal of said low-pass filter from an electric signal of said high-pass filter.