## 1 Introduction  
In recent years, attempts have been made to synthesize diverse antenna technologies to improve the impedance bandwidth of antennas for digital television reception. Specifically, in [1], a wideband dipole antenna for digital television reception was proposed using a multi-loop radiator and a coplanar waveguide feed. In [2], an antenna with seven resonance pads on the ground plane was proposed to improve the impedance bandwidth. In [3], an internal antenna that combined a planar inverted F antenna (PIFA) and a loop antenna for digital television reception achieved an impedance bandwidth of 48%, covering 470-771 MHz. In [4], a miniaturized wideband meander-line antenna using a magneto dielectric material was developed for the DVB-H/LTE13/GSM850/900 applications. Despite wide impedance bandwidth [1, 2, 3, 4], these antennas suffer from low gain. As a result, further attempts were made to develop antennas for digital television reception with wide impedance bandwidth, high gain, and stable radiation pattern throughout the operating frequency band (470-890 MHz). Specifically, the bowtie antenna technology was adopted in the development of antennas for digital television reception due to impedance bandwidth enhancement [5]. In addition, the Yagi-Uda antenna technology was deployed to achieve high gain and directionality [6]. For the bowtie antenna technology, a U-shaped bowtie magneto-electric dipole unidirectional antenna with a dual-layered horn reflector was proposed for ultra-wideband applications [7]. In [8], multiple bowtie patch antenna configurations with broadband operation, adjustable beamwidth, and multiple-beam capability were proposed for broadband indoor wireless communication. In [9], an adaptive ground penetrating radar (GPR) antenna based on bowtie antenna technology was proposed for the classification of soil types. In [10], an antenna with a bowtie dipole element above the ground plane and a metallic bridge for wide beamwidth was proposed for base station applications. A tapered bowtie slot antenna [11] and a cavity-backed bowtie antenna [12] achieved the unidirectional radiation pattern. In [13], a substrate integrated waveguide (SIW) cavity backed bowtie slot antenna was proposed to improve the gain and unidirectionality. In addition, a unidirectional bowtie array antenna with an incision gap for digital video broadcasting-T2 base station applications was proposed in [14]. The Yagi-Uda antenna is conventionally used for television signal reception, and it is normally installed on the rooftop. The advantages of the Yagi-Uda antenna are its simple design, low cost, and reasonably high gain. The principal elements of the Yagi-Uda antenna include the radiator, the reflector, and the director [15]. In [16; 17], the broadband Yagi-Uda antennas were proposed for wireless communication applications. Currently, the antennas commonly used for digital television signal reception include loop antennas, omnidirectional dipole antennas, monopoles, log-periodic dipole arrays (LPDA), and quasi-Yagi antennas [18]. The loop antennas, omnidirectional dipole antennas, and monopoles can receive signals from every direction but achieve a low gain [19; 20; 21; 22]. Meanwhile, the LPDA and quasi-Yagi antennas realize a high gain by using multiple dipoles. However, the unidirectionality of the LPDA and quasi-Yagi antennas gives rise to several installation challenges [24; 25; 26]. To overcome such shortcomings, this research thus combined the Yagi-Uda and bowtie antenna technologies in the development of the portable wideband directional antenna scheme with a radome for digital television reception. By definition, a radome is a structural enclosure that protects an antenna and is constructed of materials that minimally attenuate the electromagnetic signal transmitted and received by the antenna [27; 28].