Line Slot Antenna Research Articles

Parametric study of the co- and crosspolarisation characteristics of tapered planar and antipodal slotline antennas

A parametric study of the co- and crosspolarisation characteristics of tapered planar and antipodal slotline antennas having different tapers has been undertaken with the aim of using them as elements of wideband phased arrays on a stand-alone basis or in conjunction with the reflectors/lenses of imaging systems. The planar tapered slotline antennas have better crosspolarisation characteristics than their antipodal counterparts which have better input impedance characteristics. The study reported here was conducted in the 3–12 GHz band and yielded a wealth of information which will complement the theoretical studies which are in progress.

Tapered slotline antennas at 802 GHz

Broken linearly tapered endfire slotline antennas (BLTSAs) were fabricated on 1.7- mu m thin SiO/sub 2/-Si/sub 3/N/sub 4/ dielectric membranes. Antenna patterns in the E-, H-, and D-planes were measured at 802 GHz. The -10 dB beamwidths were found to be approximately 40 degrees in all planes, with side lobe levels below -11 dB (-19 dB in the E-plane). The cross-polarized peaks in the D-plane were 8 dB below the copolarized peak. A theoretical model for calculating the E- and H-plane patterns of tapered slotline antenna 10 is extended to include the co- and cross-polarized D-planes. Measured and calculated patterns show good agreement.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

Novel feedline for linearly tapered slotline antenna (LTSA)

A linearly tapered slotline antenna for X-band, with a novel parallel feedline, realised on a soft substrate by a photolithographic process, is described.

A new MIC slot-line aerial

The design and performance of a new microwave integrated circuit (MIC) slot-line antenna is presented. The new antenna has a narrower beam for the same order of gain as that of the conventional MIC dipole and resonator antennas. The antenna operates in <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">X</tex> -band with a gain of 6 dB and a sidelobe level of 10 dB. It can be easily integrated with other MIC components.

Optoelectronically pulsed slot-line antennas

Short electromagnetic pulses of high power are generated via an optoelectronic switch. By means of an integrated set-up it is demonstrated that these pulses can be directly used to drive a broadband slot-line antenna. In this way, radiation of high-power microwave pulses is achieved.