Low‐profile GSM‐DCS‐PCS‐UMTS wire patch antenna on small ground plane

Abstract

A small radiating element, designed to work simultaneously in GSM-DCS-PCS-UMTS

A wideband low‐profile monopolar patch antenna

“…1 is only 3% for voltage standing wave ratio (VSWR) < 2. Recently, some techniques have been utilized for impedance bandwidth improvement, such as coupling feed method [2][3][4][5][6], planar monopoles or cylindrical monopoles in replacement of feeding probes [7][8][9], and ground plates(or shorting wall) in replacement of ground wires [3,5,7].…”

“…In these cases, the antenna and filter can be fabricated separately on different metallic layers in the package, at the cost of increasing the design complexity. Recently, attempts were also made to embed the filtering element into the antenna feedline [4]. To improve the performance of the ultrawideband transceivers, the antenna and bandpass filter are preferably integrated together to perform frequency preselection in radiofrequency front-ends [5].…”

Simple antenna structure enabling the simultaneous excitation of two different polarisation and radiation modes

“…In comparison to a standard vertical dipole that would provide a similar omnidirectional radiation pattern, a size reduction of about 84% has been reached. This kind of radiation behaviour is obtained since the antenna basically operates like a wire-patch antenna [22,23] at this frequency. This is demonstrated by the surface currents distribution reported in Fig.…”

Low‐profile tetra wire‐patch antenna for automotive applications

“…These antennas enable the omnidirectional radiation typical of dipolar elements but exhibiting a compact and solid structure which is preferred when the antenna has to be mounted on a vehicle. Following this idea, several prototypes have been proposed during the years for both single‐band [3–5] and multiband applications [6, 7].…”