Design of Switchable Dual-Balun Feeding Structure for Pattern-Reconfigurable Endfire Antenna

A Pattern-Reversal Wideband Antenna Integrating Metal Rings, Diodes-Loaded Stubs and Defective Ground

“…The performance comparison between this work and other published beam-reconfiguration antennas is shown in Table 3. The antennas in [10]- [12], [21] and [22] have higher gain, but they own narrower bandwidth. Meanwhile, the size of antennas in [11], [12] and [21] is larger.…”

“…Therefore, the antennas mentioned above either have too narrow working bandwidth, too low gain, or too large size to be utilized conveniently, which cannot well meet the requirements of wide band, high gain and small size in the contemporary wireless communication system. Further, although there are more number of reconfigurable modes in [10]- [12], [14], [15], [21] and [22], more diodes are utilized, which makes the antenna structure more complex. The comparison results show that the proposed antenna has a compact structure, wide bandwidth and good gain characteristics as a whole, which can improve effectively the quality and capacity of the communication system.…”

“…[21] achieved the beam reconfiguration by selecting the appropriate excitation port combination for the slot patch with double-sided frequency selective surface. [22] proposed a microstrip switchable double balun with symmetrical threecoupling-line structure as the feed network to design the radiation mode reconfigurable end-fire antenna. [23] used a microcontroller to switch the array of cubes excited by the feed network.…”

Single‐layer dipole antenna with large angle beam deflection and frequency scanning capability

“…[2][3][4] By introducing electronic components, such as PIN diode, into the antenna, the direction of the main beam can be tilted. [5][6][7][8][9][10][11][12][13][14] The drawbacks of these methods are introducing additional losses and complicating the feed networks. Top-loading meta-surface is a prevalent beam steering measure, [15][16][17][18][19][20] but these methods are not suitable for lowprofile applications.…”

“…Phased arrays can be used to precisely steer beams, however, the cost of the feed network is too high for phased arrays to be widely used in low‐end commercial products 2–4 . By introducing electronic components, such as PIN diode, into the antenna, the direction of the main beam can be tilted 5–14 . The drawbacks of these methods are introducing additional losses and complicating the feed networks.…”