In a number of applications, a matching network capable of providing specified impedances at different frequencies is necessary. In this brief, we present a novel technique for switchless multiband impedance matching networks based on multiresonant circuits. To illustrate this, simulation results of dual-band and triband networks are also presented. In addition, a dual-band impedance matching network has been implemented and evaluated. The dual-band impedance matching network presents two specified impedances, one at 433 MHz and the other at 915 MHz with 0.82 and 0.20 dB of insertion losses, respectively.

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In a number of applications, it is necessary a network which could provide well-defined impedance values at different frequencies, that is a multiband impedance matching network. In this paper, we present a novel approach for dual-band impedance matching network design using multiresonant circuits. These multiresonant circuits provide short and open circuit conditions at different frequencies, thus enabling and disabling capacitors and inductors to form the desired impedance matching network. To illustrate the proposed method, experimental and simulation results of a dual-band impedance matching network operating at frequencies 2.4 GHz and 5.2 GHz are also presented.