Antenna-on-Display Concept on an Extremely Thin Substrate for Sub-6 GHz Wireless Applications

70‐1: Antenna‐on‐Display (AoD) for Smartphones: Role, Main Requirements, and Promising Antenna Evolution

“…(b) Visual-wise: To achieve high visual quality of a display, the transparency of the film(s) for AoD and the whole display (inclusive of the touch panel) should be secured. The common reported values of transparency of the film for AoD are higher than 85% [5], [13], [14]. Besides, when AoD is adopted, the mura and haze phenomena caused should be minimized or even prevented as well.…”

“…Although typically some mentioned design conditions (e.g., the heights from antennas to the closest underlying metal, the spacings between antennas and neighboring metal meshes, etc.) are even more challenging to the AoD-based FR1 microwave antennas than the AoD-based mm-wave antennas, what deserves interests and attention is that in addition to the discussed current mainstream role as a complement to mm-wave AiP modules the AoD is also attracting further researches [14], [17] to also attain FR1 microwave antennas (e.g., for 5G, long-term evolution (LTE), wireless local area network (WLAN), Bluetooth (BT), etc.). For most of FR1 microwave antennas in smartphones, practically, the requirement on polarizations doesn't really matter so much.…”

Optically Transparent Antenna for Smart Glasses

“…On the other hand, Metal Mesh (MM), as one of the TCFs, has been mainly used in touch sensors on display and electromagnetic shield in the past. Recently, the use of MM to design transparent antennas has gained increasing attention from the industry owing to its low resistivity [1], [2], [7], [8], [27], [28], [29], [30], [31]. MM can be made from manufacturing methods, such as subtracting method by photo-lithography, additive method by plating up, printing, transfer method, etc., these process similar to the general fine pattern for PCB or Integrated Circuit (IC) manufacturing.…”

“…Therefore, the transparent antenna has been drawing attention from industry recently as one potential solution to address the antenna volume constraints and to achieve a high design freedom. Many transparent antenna research and application in consumer electronic domain have been focused on the transparent antenna and display integration for smart phone [1], [2], [3], [4], [5], [6], smart watch [7], [8], etc. Large space or high freedom of placement are desired in the design for antenna performance optimization, for example, antenna efficiency, antenna gain, bandwidth, antenna isolation, tuning capability, polarization, and so on.…”

35.1: Promising Integrations of Antenna‐on‐Display (AoD)‐based Millimeter‐wave and Microwave Antennas for Cellular Phones

“…Moreover, the AoD-based antennas can achieve broad spatial coverage of radiation beams to reduce blind zones of wireless communications. Currently, for the cellular phone applications, most available AoDbased designs [1]- [3] are mainly for mmw antennas with less designs [5], [6] for (FR1 [7]) mcw antennas. Nonetheless, in the design [6], both AoD-based mmw or mcw antennas are separate, which will hence unfavorably occupy a large total area when the antennas are deployed on the same display; in this conventional way, the visual, touch, and electromagnetic compatibility (EMC) performance may be severely impacted accordingly due to lots of areas occupied by antennas.…”