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In order to meet the requirement of SAR, a low profile 64-cell millimeter wave phased array antenna is developed, which is integrated of antenna array, feed network, power network and wave control network in a multi-function antenna board. The transceiver channel is integrated in a multi-function transceiver chip, which simplifies the topology of the transceiver link of phased array antenna. The size of the phased array antenna is $130\text{mm}\times 80\text{mm}\times 45\text{mm}$ , which can meet the requirements of light weight and modularization. Measurement shows that millimeter wave phased array antenna has a scan range of more than ± 45 degrees, the emission of EIRP is greater than 51dBm, and the cross-polarization performance is better than 30dBc. The 64-cell millimeter wave phased array antenna can meet the needs of low-profile SAR.

In order to meet the needs of 5G millimeter wave communication, a 64-cell millimeter wave phased array antenna is integrated with antenna array, feed network, power network and wave control network in a multi-function antenna board. The transceiver channel is integrated with multifunction transceiver chip, which simplifies the topology of the transceiver link of phased array antenna. The size of the phased array antenna is 130mm$\times$80mm$\times$45mm, which can meet the requirements of light weight and modularization. The tested millimeter wave phased array antenna has a range of ± 45 degrees, and the emission of EIRP is greater than 51dBm. The cross-polarization performance is better than 30dBc. The 64-cell millimeter wave phased array antenna can meet the needs of 5G millimeter wave communication.

Spinel ferrites can be used in magnetic targeting and microwave heating and can therefore be used for targeted and controllable drug delivery. We used the cetyltrimethylammonium bromide-assisted solvothermal method to synthesize a series of spinel ferrites (MxFe3-xO4, M=Mg, Mn, Fe, Co, Ni, Cu, Zn) with a mesoporous or hollow-mesoporous structure suitable for direct drug loading and the particle diameters ranging from 200 to 350 nm. We investigated the effects of M2+ cation on the morphology and properties of these products by analyzing their transmission electron microscopy images, mesoporous properties, magnetic properties, and microwave responses. We chose hollow-mesoporous MxFe3-xO4 (M=Fe, Co, Zn) nanoparticles, which had better overall properties, for the drug VP16 (etoposide) loading and microwave-controlled release. The CoxFe3-xO4 and Fe3O4 particles trapped 61.5 and 64.8%, respectively, of the VP16, which were higher than that (60.4%) of ZnxFe3-xO4. Controllable drug release by these simple magnetic nanocarriers can be achieved by microwave irradiation, and VP16-loaded CoxFe3-xO4 released the most VP16 molecules (more than 50% after 1 h and 69.1% after 6 h) under microwave irradiation. Our results confirm the favorable drug loading and microwave-controlled delivery by these ferrites, and lay a theoretical foundation to promote clinical application of the targeted controllable drug delivery system.