R., El Bouslemti1. F., Salah-Belkhodja22023-05-222023-05-222019-06-01R. El Bouslemti1*, F. Salah-Belkhodja2. DESIGN, SIMULATION AND REALIZATION OF A COMPACT DUAL BAND MEANDERED COUPLER. Journal of Fundamental and sciences. vol.11, no 3. june 2019. Faculty of exact sciences. university of el oued. [visited in 01/09/2019. available from [copy the link here]https://dspace.univ-eloued.dz/handle/123456789/23846articalTelecommunication systems increasingly require the use of miniaturized passive microwave components. One of these is the directional coupler, a four-port component intended to distribute power to two output ports, the fourth port being isolated. This paper proposes a dual-band branch-line coupler (BLC) with an extremely compact microstrip structure. The application of meandering lines as the coupler’s central connector yields dual-band operation. HFSS is used to optimize the device and to verify its transmission characteristics. This yields a design of a coupler with a footprint is 23×34.6 mm², operating at 1.65 / 3.30 GHz, with ports that can be adapted to a load impedance of 50 Ohm. To validate the model, the coupler is fabricated using microstrip technology on a FR4 substrate. A good agreement between measurement and simulation results is obtained. The coupler achieves an excellent isolation of –42.41 dB and a transmission loss of only –2.29 dB at 3.30 GHz.enmeandered line; miniature size; dual-band; directional coupler; microstripArticle