## 2 Related Work  
The Yagi-Uda antenna, commonly referred to as the Yagi antenna, is the most used antenna for TV reception. It was invented in 1926, so it is time to replace it with a novel design because of discoveries in new materials and structures since then. We need to move to a new type of antenna, but the research is tremendously challenging since the Yagi antenna's performance is very good. Few antenna designs for DTV applications are presented in the literature. The antenna presented in [3] combines a planar inverted-F antenna (PIFA) and a loop antenna to achieve wideband operation in the UHF band. However, the operational bandwidth of the proposed PIFA-loop antenna is 460-870 MHz. Another interesting wideband antenna structure is a low-profile sinuous slot antenna constructed on a Rogers RO3206 substrate [4], where the gain varied from 2.5 to 6 dBi in the frequency range of 0.53-4.86 MHz. As discussed above, these antennas require filtering due to the nearby frequencies/channels of the LTE band presented in this range, which can cause interference to the desired existing allocated services. Another limitation is that this PIFA-loop antenna is targeted to be used only indoors. In [5], a monopole antenna is proposed for DTV applications with a wide operational bandwidth (451-912 MHz). Likewise, this design is not suitable for the main requirement, which is the reduction of interference from the LTE band. The monopole antenna [5] has a gain of 1.7 dBi, which is very low compared to that of other DTV antennas. In order to increase the gain, a solution was proposed in [6] that was based on a unidirectional array of bowtie antennas with an incision gap. The measured gain for this antenna array was 13.4-16.1 dBi. The design demonstrated good half-power beam width (HPBW) in the vertical plane of 15\({}^{\circ}\) from 470 to 862 MHz. Besides these features, the antenna also has return loss (RL) greater than 10 dB over a frequency range of 450-1014 MHz. A good example of a microstrip channel tuned antenna for Integrated Services Digital Broadcasting-Terrestrial (ISDB-T) was proposed in [7], but the gain was very low, around \(-\)2.16 dBi. Another challenging problem is how to reach the appropriate bandwidth of a microstrip antenna. For example, as was shown in [8], a bandwidth increase of about 13% could be obtained by proximity coupling. However, this method has great complexity of design and construction. The simplest and most direct method is to increase the thickness of the substrate, that is, to use a thicker dielectric with a lower dielectric constant. This enables an increase in bandwidth and efficiency; however, the possibility of surface-wave formation may decrease antenna radiation performance [9]. Extending this principle in order to achieve broader bandwidth, we propose a double-dielectric array antenna that adds another dielectric layer between patch substrate and ground plane. The second dielectric should have low permittivity, as discussed in Section 3. Alternatively, low-permittivity composite materials and metamaterials with a magnetic response, could be used to improve the bandwidth of microstrip antennas [10]. In this paper, we propose a new antenna that is well-matched at the frequency of interest and has the appropriate bandwidth, thus rejecting adjacent frequencies/channels such as the ones from the LTE band. The antenna was designed with linear polarization. Regarding the radiation pattern of the antenna, the main lobe had to be narrow enough to distinguish signals coming from different directions. Thus, by placing such antennas in a horizontal-array configuration, we could point the array radiation pattern maximum in the direction of the most favorable DTV broadcast signal (in terms of received power and modulation error rate), and simultaneously point the radiation pattern nulls in the direction of interfering signals. In this paper, we open a new path for motivating the research community to develop new antennas for TV reception.