Merih Palandoken

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A novel type of microstrip antenna is proposed for compact wideband wireless applications. The antenna is composed of six unit cells of left-handed metamaterial (LHM) and a dipole element. The dipole is directly connected to three of six LHM unit cells, which are arranged in a 2 times 3 antenna array form. In this aspect, the proposed antenna is regarded as(More)
In this paper, a novel fractal spiral resonator is presented. The geometry of the proposed structure is based on the direct connection of two concentric Hilbert fractal curves of different dimensions as in a spiral form. The magnetic resonance and negative permeability are demonstrated by numerical simulations and analytical calculations. The unit cell size(More)
In this paper, a novel fractal metamaterial with negative permittivity is presented. It consists of two pairs of fractal Hilbert curves with antisymmetric current distribution at resonance. The resonant current distribution shows that the structure behaves as an electrically small dipole. This approach, which is different from the conventional Complementary(More)
A compact, low-insertion-loss, high selective band-stop filter is proposed. The filter is composed of four unit cells, two of which are anti-symmetrically connected left-handed metamaterial (LHM) unit cells in combination with their mirror images to obtain the symmetric return losses at both ports. The design of LHM unit cell is based on direct connection(More)
In this paper, we report on a novel photonic integrated 70 GHz band (71-76 GHz) photoreceiver module featuring a 1.55 μm double-waveguide photodiode (PD) implemented with a planar bias-T, a low-noise amplifier (LNA), a high-power amplifier (HPA) and a grounded coplanar waveguide (GCPW) to WR-12 rectangular waveguide transition. The photoreceiver(More)
Here, we present novel high-power partially p-doped, partly non-intentionally doped absorbing double mushroom-type 1.55 μm waveguide photodiodes for integration in compact photonic transmitter modules employed in E-band (60-90 GHz) radio-over-fiber systems. Besides the high-output power levels approaching 0 dBm and a high linearity in the 70 GHz(More)
The purposes of this paper are to describe analytical and experimental design approaches for Rectangular Microstrip Patch Antenna for improvement of Bandwidth and Return Loss. This paper proposes a Conventional Rectangular patch antenna and Rectangular Slot as on Patch antenna. The simulation results show that an antenna with Rectangular Slot has improved(More)
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