A novel low profile mechanical tuning technique is introduced in this paper to change the center frequency of substrate integrated waveguide (SIW) based reconfigurable bandpass filters (BPF), by loading dielectric rods different permittivity resonant cavities and coupling apertures. The simple, cost-effective (rods are machined from conventional substrates), same physical structure provides a w...

In this work, a super wide band antenna is proposed to operate in the frequency 2.3-23 GHz. The has two planar arms with modified diamond shape printed on opposite faces of three-layer dielectric substrate. Each arm capacitively coupled circular sector near its end increase impedance matching bandwidth. substrate customized fit and parasitic elements reduce loss. material composed three layers....