A microwave resonant antenna includes a ring whose peripheral length determines the wavelength guided in the antenna. The ring incorporates meanders or crenellations. These have substantially radial parts so that, overall, they do not … US4208660A - Radio frequency ring-shaped slot antenna - Google… An array antenna is disclosed wherein each one of the antenna elements includes at least two concentric slots formed in a conductive sheet. The conductive sheet is disposed on a dielectric support and a ground plane is found on the … Design of Circular Polarized Printed Patch Antenna for…
Gain enhancement of annular slot antennas. A cross-shaped microstrip-fed ring slot antenna with large bandwidth is presented experimentally in this paper. The characteristics of the antenna ...
Microstrip-Fed Dual-Frequency Annular-Slot Antenna Loaded ... Microstrip-Fed Dual-Frequency Annular-Slot Antenna Loaded by Split-Ring Slot (PDF) A Proximity-Fed Annular Slot Antenna with Different ... A Proximity-Fed Annular Slot Antenna with Different a Band-Notch Manipulations for Ultra-Wide Band Applications A rectangular slot antenna with improved bandwidth ... A rectangular microstrip slot antenna fed by a microstrip line, which achieves a very large bandwidth on a relatively thin substrate, is presented.
An array antenna is disclosed wherein each one of the antenna elements includes at least two concentric slots formed in a conductive sheet. The conductive sheet is disposed on a dielectric support and a ground plane is found on the …
Dual-frequency Dual-sense Circularly-polarized ... Dual-frequency dual-sense circularly-polarized slot antenna fed by ... a microstrip feedline to the annular-slot. Microstrip-Fed Dual-Frequency Annular-Slot Microstrip-fed dual-frequency annular-slot antenna loaded by split-ring- slot.Abstract: A compact dual-band annular-slot antenna loaded by a concentric split- ring-slot is presented. A stepped microstrip feedline enables the control of the coupling and provides good matching. A new microstrip-fed cavity-backed annular slot antenna A single feed multi-frequency annular slot antenna is analyzed with an integral equation program and experimentally.Tuning the antenna is examined by changing the width of the slot ring and adjusting the open-circuited microstrip feed line. Microstrip-Fed Dual-Frequency Annular-Slot Antenna Loaded… The slot antenna is fed by a stepped microstrip line, which provides impedance matching. Usually, the resonant frequencies are mainly determined byFor the proposed annular-slot antenna, the first mode is mainly determined by the circumference of the inner and outer slot-rings, and the second...
A cross-shaped microstripline-fed slot antenna of large bandwidth is described. The experimental bandwidth of the antenna is from 1.765 to 4.921 GHz, which.
Wideband double-element ring slot antenna - Electronics ... Wideband double-element ring slot antenna N. Behdad and K. Sarabandi A new technique for bandwidth enhancement of microstrip-fed annular ring slot antennas is presented. US3665480A - Annular slot antenna with stripline feed ... US3665480D 1969-01-23 1969-01-23 Annular slot antenna with stripline feed ... Microstrip tee-fed slot antenna ... planar antenna with annular feed slot, ... Microstrip-fed dual-frequency annular-slot antenna loaded ...
annular slot antenna keeping constant the operation frequency. II. DESIGN CONCEPT The annular slot antenna consists of a circular slot on a square, metal ground plane that is fed by a microstrip line, fabricated on the bottom of the Duroid substrate as can be seen in Figs 1a and 1b. Big Diode Fig. 1a ASA front side Ls1 L1 D1 D3D2 L2 Ls2
1. An antenna system, comprising means constituting in effect a substantially plane conductive sheet having an annular slot therein, a conductive member secured against a face of the sheet, the said member having formed in it an annular … US4291311A - Dual ground plane microstrip antennas - Google… Microstrip antenna systems having two ground planes spaced apart by a dietric substrate and radiating elements coplanar with one of the two ground planes, or sandwiched within the dielectric substrate separating the two ground planes … US4035807A - Integrated microwave phase shifter and radiator… A substantially two-dimensional integrated phase shifter and radiator module wherein a plurality of phase shifting elements are deposited in microstrip configuration on one side of a common substrate, and at least one radiating element is …
A multiple-frequency stacked microstrip patch antenna structure is disclosed which provides substantially increased isolation between the multiple radiating elements and between the multiple feed elements. US5165109A - Microwave communication antenna - Google Patents A microwave communication antenna consists of a laminated structure having an r.f. radiating conductor affixed on the top side thereof and a feed coupling network within. The r.f. US7583233B2 - RF Receiving and transmitting apparatuses having… A log-periodic antenna having a layer of dielectric media interposed between a microstrip log-periodic portion and a slot log-periodic portion where an array of two or more log-periodic antennas that may be placed about vehicles, such as … US5661494A - High performance circularly polarized microstrip… A microstrip antenna for radiating circularly polarized electromagnetic waves comprising a cluster array (20) of at least four microstrip radiator elements (22a-22d), each of which is provided with dual orthogonal coplanar feeds in phase …