We developed a magnetic field probe consisting of a LiNbO3 optical waveguide modulator and a loop antenna element for accurate magnetic near-field measurements in the gigahertz range. We confirmed the probe invasiveness by measuring magnetic field distributions above a patch antenna operating at 2.49 GHz using the probe. Then we compared those measured results with those for shielded loop probe...

A cascade of resistively loaded etched rings in waveguide is proposed to act as the load in a balanced FMCW Reflected Power Canceller topology using a slotted waveguide array antenna. A synthesis technique using derived equivalent circuit models, is presented and tested.

Microstrip-line-feeding waveguide aperture antenna is developed in the 70-90 GHz band. A double-layer LTCC substrate is attached to the waveguide aperture opened on the wall of the metal package. The bandwidth over 20 GHz is observed in the simulation and the experiment.

In this paper, a coplanar waveguide (CPW) fed microstrip patch antenna with multiple slots on patch is designed with method of movement (MOM) based IE3D tool. The designed antenna is having the substrate dimensions of 16 mm height and 12 mm width, which can operate at 5.8 GHz band with good impedance matching. The proposed antenna shows stable radiation pattern with 3.8 dBi gain, -54 dB return ...

We have modeled and simulate asymmetric microstrip folded dipole antenna on substrate materials and study the antenna performances. The conventional wire dipole antenna configurations are converted into corresponding microstrip version. The complementary nature of parallel coplanar strip line and waveguide models have been used to model the dipole antenna. The transmission line parameters namel...

In this paper, a design of compact coplanar waveguide fed UWB slot antenna is presented. The proposed antenna has simple structure consisting rectangular slot with uneven coplanar ground structures. The proposed antenna structure is investigated by using MoM based electromagnetic solver IE3D. The simulation and measured results show that the antenna offers performance for wideband system from 4...

Circularly polarized broadband antenna using waveguide and an L-shaped feed probe is presented. The effect of the diameter of the L-shaped feed probe is investigated and four square poles are installed at the inside corner of the waveguide to enhance the bandwidth in S11 and AR.

An alternative configuration for an infinite coaxially endfed waveguide phased-array antenna is explored. In the proposed configuration, the integration of the end-fed launcher and the output waveguide, rather than the waveguide in itself, acts as a basic radiator. This allows the design of more compact antenna elements. In order to analyze and optimize the structure, an accurate full-wave simu...

Millimeter-wave antennas have been developed for applications of broadband high-speed wireless communication systems and automotive radar systems in these days. Microstrip antennas (MSA) are more advantageous than other millimeter-wave antennas at the viewpoints of low-profile and low-cost. The antenna is connected to the backed RF circuits through the waveguide in the millimeter-wave module as...

A silica/electro-optic (EO) polymer phase modulator is proposed for millimeter-wave (MMW) radiation receiver with the use of a bowtie antenna. Waveguide design optimization is presented for a waveguide with an EO polymer core and silica/solgel cladding. Electrode effects on the insertion loss and poling efficiency are also analyzed and conditions for low-loss and high poling efficiency establis...