RU2208275C2 - Wide-band phased antenna array - Google Patents

Abstract

FIELD: television signal reception. SUBSTANCE: antenna array has cophasal system of antenna sections built of rhombic dipoles and band-extending dipoles connected to output of rhombic ones and integrated into single system with aid of antenna-feeder device that functions to transfer signal energy to common matched load. This system is assembled of antenna sections made as dipoledipole combination using parallel circuit arrangement to extend its passband. Provision is made for varying polarization of dipoles depending on their type. Relatively simple design and adequate characteristics of antenna array makes it competitive. EFFECT: enhanced gain of antenna array. 1 cl, 1 dwg

Description

 The invention relates to the field of radio-television transceiver technology and can be used to receive low-power radio and television electromagnetic signals in the frequency range set by the broadcast television network I to V with the corresponding polarization standard.

 Known television receiving antennas described in the reference manual Individual video tools / Ed. S.A.Sedova. - Kiev: Naukova Dumka, 1990, p. 150-151, using a common-mode system of several antennas for receiving decimeter waves (UHF), which allows to increase the gain. The antenna array made by this method receives only a limited portion of the TV broadcast, in particular UHF (or meter waves (MB). At the same time, the simultaneous reception of the entire range of TV broadcast is structurally impossible.

 The ARF is known (see Kismereshkin V.P. Television antennas for individual reception // 2nd edition, revised and extended. - M: Radio and communications, 1962, p. 48-52. Mass radio library. Issue 1050. The author took for the prototype). ARF includes a common-mode system of several antennas, made in the form of diamond-shaped vibrators, sequentially or parallelly operating at a common agreed load, there is a flat reflector that increases noise immunity and low gain.

 Obtaining a relatively high broadband is achieved here due to the design features.

 However, such an antenna also has disadvantages. These are bandwidth limited by design and operating principle. ARF in our case is capable of receiving only the DMV section of the TV broadcast. The technical solution to the problem of obtaining all-wave reception, increasing the gain is achieved due to new design solutions.

 The technical solution is achieved by the fact that the ARF, consisting of several parallel (or sequentially) in-phase coupled antenna sections, made in the form of diamond-shaped vibrators, matched to the total load, is equipped with additional band expansion vibrators connected to the output of the rhombuses with the possibility of changing polarity. The novelty in the device part is that additional band expansion vibrators included in a single common-mode system, connected to the output of the rhombo-vibrators, receive the TV signal of the MV range, transmitting it via the communication system to the total load in the summing mode, when the rhombo-vibrators also independent reception of the UHF signal according to the same scheme.

 The novelty in the device part is that the parallel operation of all the diamond-shaped DMV vibrators and the expansion of the MV band does not lead to citation losses, since the MV range signal received by the band expansion vibrators goes to the load and does not branch out to the shunts of the rhombuses, because the latter at the operating frequency of the MV range have insignificant conductivities, which are of a complex complex nature, little associated with wave impedances. Similarly, the UHF signal received by the vibrators is weakly interacting with the output resistances of the band expansion vibrators. The novelty in the device part is that the “residual” signals, following the principles of superposition induced in critical modes, on parallel free vibrators due to the energy of the neighboring range are summed with the main ones in common mode, thereby compensating for possible losses of the interconnecting effect, which is facilitated by the change the polarity of the strip expansion vibrators depending on their type. The novelty in the device part is seen in the fact that all vibrators: diamond-shaped and additional band extensions - work in a single in-phase mode, providing optimal phase ratios of the source signals when they are summed at a common matched load.

 According to the technical, scientific and patent documentation, no combination of features has been identified, such as in the claimed device, which indicates an inventive step.

 The industrial applicability of the claimed technical solution is seen in the comparative simplicity of manufacture, high electrical performance, the possibility of industrial use and a competitive level. The antenna is illustrated with graphic material containing an electrical circuit and structural elements.

The drawing shows a phased array antenna array 3. The ARF consists of: a 1-2-phase system of antenna sections - 1-2, including diamond-shaped vibrators 1, designed to receive the UHF signal, made in a known manner, additional vibrator 2 expansion band, providing signal conversion of the MV range using a linear, fan, loop or other vibrator, made in a known manner, connected to the output of diamond-shaped vibrators, antenna-feeder device (AFU) 3, which together provides a common-mode for prison all antenna sections, performed in the combined embodiment, the total matched load R _n 4. Provided directly, without insulators, mechanical fastening points of the antenna sections in the "0" and the possibility of changing the polarity of plug vibrators.

Antenna array works as follows. The received electromagnetic signals are fed to the corresponding vibrators 1-2, which are part of the antenna sections, converted to EMF and are summed in common mode at the total load R _n 4, passing in turn, depending on the excitation point, through all structures 1-3. In this case, a change in the polarity of the connected vibrators 2, depending on their type, helps to optimize the phase ratios of the signals summed by R _n 4. According to AFU 3, the final power is supplied to the consumer.

 In this case, the useful signal of the vibrators 2 of the MV range towards the shoulders of the rhombo-vibrators 1 does not branch out, since the latter have small conductivities at the operating frequency of the MV range, which have characteristic complex values.

Claims (1)

 Phased range antenna array, consisting of a common-mode system of antenna sections made in the form of diamond-shaped vibrators, matched to the common load, characterized in that the antenna sections are equipped with band expansion vibrators connected to the output of the diamond-shaped vibrators with the possibility of changing polarity.